Sometimes people who are desperate enough for money will forego respect from others if they feel they have to in order to get the  money they need so badly.  But most high-end providers are not in this situation, and so they can also focus on something that is actually even more basic - respect.

Although I don't doubt for a minute that many providers enjoy the pure sensual pleasure of good sex, I have a strong sense that when they emphasize that they want to be pleasured by the man, they are also looking for the implied respect that comes from feeling that their sexual needs are important too, and along with this the sense that they are important and respected as people. Being respected can be a very sexy experience.

Some providers "give up" on the idea of trying to be truly respected by clients - perhaps they have been burned too many times and just don't want to put the emotional energy into it.  So they build a defensive shield to protect themselves, and tell themselves "I really don't care whether a given client respects me or not".  This of course is connected to a lack of respect for the client, and perhaps even some hostility.  But it comes from having been burned in the past, and it's hard to fault them for wanting to avoid more pain.

On the topic of respect:  As has been said many times, you cannot respect others until you first respect yourself.