photo id and credit and or business history is an important part of an independent feeling safe. Unfortunately for all of us, they have to weed out the 1 in 100 assholes for their safety. Put it this way, it you were a 110 pound woman that advertised that you are willing to commit some pretty amazing and highly sought out services from every man in the world, wouldn't you want some assurance that the man you are going to see has committed his identification and an ability to pay.
If you did not do those things, do you realize how tempting it would be to visit and force you to perform those services for no compensation? How about the sick fuck that enjoys beating helpless women as a hobby. Do you want to live thru that and if you knew of someone that has gone thru that, would you take their advice and screen all customers completely and thoroughly?