The reason for not seeing someone who has no reviews doesnt really equate to the reasons you are stating. For you, it doesnt seem to matter, as if it would get in the way of having a good time? Were trying to avoid having a horrible time, so reviews make a lot of difference.
Here a a few, very legitamate reasons to only want to see someone who is reviewed:
1. First and foremost, are they are legit. Not police, not rip offs, and if they are indeed the person in the picture. Are the pictures 10 years and 100 pounds ago?
2. Tells them what the girl does and does not do. While it isnt always 100% and YMMV comes into play, it still lets you know. I know what I am looking for, so Im not gonna drive an hour only to find out that the girl doesnt do A, B or C. These are questions you cant ask on the phone.
3. Cost - Lets you know how much the girl costs.
4. Performance. One bad review or one good review doesnt mean everything, however 10 good reviews or 10 bad reviews say quite a bit.
Providers have their own hardships to endure dealing with customers, well, so do we. Everyday there are ads with fake pictures posted, and guys who spend hundreds of dollars getting scammed by non performers or stings.