Very interesting question, big sky,
and were I to give an absolute answer, I'd get many postings telling me I was dead wrong. Some providers have distinctly dual lives and do not appear to incur any stress from it whatsoever. Of course, the human body rarely lies and in that case, you could find a preponderance of somatic complaints instead. Many can suffer from something chronic, or what appears to be a "delicate system," when in fact all those physical complaints go away when the unconscious stress level goes down.
On the other hand, it's not just the double life that may be stressful, it's the whole "professional disease" that accompanies any type of job strain. For providers, it's usually the lack of job security,i.e. when and where's the next call going to come from; the constant fear of getting arrested by LE, hence the time spent screening, verifying, wondering, checking, setting up elaborate buddy systems to ensure safety when going on outcalls, etc; the enormous attention paid to reviews, not just TER, but other review boards as well; monitoring all sorts of back-channeling and rumors in general - here's where relationships to other providers play a huge role, and it's not always pleasant; the emphasis on always looking one's best - that's why many providers just don't have the energy to look like Barbie dolls in private life, thereby attracting the attention of civvie men; fear of getting recognized on the street - another motivation for sunglasses, baseball caps and shapeless sweats during off-time; fear of neighbors making reports, thus the stress of always making nice with neighbors and supers in buildings; the tax man who requires a detailed explanation of where those couple of 100Ks come from; and, a million other things that I neglected to list, because your question was actually about LOVERS!
See how far I got in my answer before remembering your original question? This is because in some way, lovers are not exactly at the top of a list for a successful provider. N.b. that I am not inferring some sort of physical or psychological abstinence for providers per se; it's just that there are so many other issues that deal with the fundamentals of being a quality provider that boyfriends and lovers may not be the end-all, be-all they seem to be for many civilian women.
As to the "blur of lovers" for providers, I think it's a huge myth. On the contrary, many providers don't have boyfriends at all. For one, as stated previously, it's very hard to lead a double life. It entails making up watertight stories, sticking to them and altering them as time goes on. Two, if the wish is to be truthful, it's not that easy for a woman to find a man who will go along with his loved one sleeping with other men as a job. Yes, there are men who will agree to it, but they are a minority. Check out TER's past archive poll, and you'll see what TER members have to say - and they are probably a little more liberal than the rest of the nation in this regard.
As to the woman you described in the latter part of your question, remember this one: she's a provider, you're a client. She may very well have a lover/boyfriend/husband and you wouldn't know any of it, because you are a CLIENT. Providers do not owe clients the truth, they owe clients a paid phantasy. Many providers feel that it's none of any client's business to know about boyfriends, lovers, etc. In fact, some may even have children and you wouldn't know it either.
I can't say with certainty if this particular provider's response means that her needs for sex and intimacy are satisfied by clients. Maybe she is not CAPABLE of receiving intimacy, or desirous of it in her life at this time. Maybe she has been hurt in the past and she feels comfortable with the distance component of a provider-client relationship. It's hard to gauge without having spoken to her directly. Also, remember that providers in general are afforded a great deal of freedom and independence due to their earnings. For a provider to replace prostitution earnings with the same amount earned in a 'legal profession,' she'd have to become degreed professional overnight with gainful employment, e.g. a first year associate in a legal firm, a consultant with McKinsey, an MD working for an HMO...or a winner of 'American Idol' or the lottery. A provider may be caught in a financial cycle where it's impossible for her to quit. Car and house payments, private school for the kids, supporting extended family, etc etc etc. A myriad of financial obligations may make it impossible for a provider to quit. A boyfriend or husband would merely complicate the situation. So what to do?
Almost all providers become experts at compartmentalizing. Some do it in their love life, e.g. they will pick unsuitable boy-toys and male arm-candy who couldn't work his way out of a paper bag [guess who picks up the tab every time!] Other providers become afflicted with the rescuer syndrome and hook up with what is popularly termed 'loser guys' - unemployed, depressed, always at the short end of the stick - and then guess who provides a warm home, clean sheets, endless love and caring [but also the emotional control and the power to kick the guy out when necessary!] Another group of providers may just repress their need for emotional intimacy and state that they get all their physical and mental requirements met by 'fabulous clients.'
Lastly, I believe that if a provider's work were not seen with such immense societal derision worldwide [yes folks, even where prostitution is legal, it ain't sumpt'n you bring home to momma,] the issue of a dual life with hidden lovers and compartmentalized feelings would be highly minimized. That's why - and this is another 'dirty provider secret' - many providers dream about being 'bought out,' although it's not something that's brought up often, nor is it freely discussed among providers. When Madam Alex was at the height of her popularity in Los Angeles during the early 80s, many of her employees 'defected' to the altar with wealthy older men. In those cases, many of the men were ex-clients, others were simply in the world of high rollers who met these women at the Playboy mansion, at private night clubs, etc. I'm sure these marriages were not just mercenary arrangements, but it seems to me that most of these men knew what these girls had been up to in the past, and that it wasn't that important to them anyway. And for the girls, it represented a ticket out.
The interesting issue is always the exit strategy of a provider when she reaches her 50s and beyond. No one wants to be pathetic and providers, just like any other person, live in an extra special fear of of it. Plastic surgery only goes so far, plus the issue of menopause is another difficulty. Many providers end up quitting sex work and entering serious relationships only at that juncture, often with someone who can support them while they either go into complete retirement or prepare for another career.
I also believe that it's a myth that the average provider has saved so much for a rainy day that she can comfortably retire. Most providers don't make THAT much money, plus the lifestyle can be so grinding and stressful that those Manolo Blahniks, trips to faraway lands, or even just hanging out with lesser-monied friends/boyfriends/lovers during the time of providing, can prevent the provider from adding to her financial retirement plan.
So as you see, big sky, the "blur" of lovers really is a "blur" of issues that take precedence, in the sense that they affect the most basic needs of existence. Yes, lovers and boyfriends are in there somewhere, but work always has to come first. And finally, as to moralizing and asking the sometimes 'why don't they just do something else' - my answer would be, 'they would - if there weren't any men who supported the existence of this very noble profession!'
Still an incomplete answer,
the Love Goddess