How do I know?
Try asking a prostitute what she likes about her job or even what she thinks prostitutes all over the world like about their job.
They call it the "oldest profession" because not a lot has changed you know ...
You're of the opinion that prostitutes don't despise their clients.
I am of the opinion that they do
(although I 'm pretty sure that if I said the sky was blue you would contend that too)
I cited my experience working in a soup kitchen.
You have cited that you don't imagine prostitutes despise their clients, that you don't imagine they would frequent a soup kitchen, that you don't imagine people in a red light district can afford a prostitute and that you imagine at a certain degree and level they're having a ball (... there goes your image of crusading the cause for women's rights in poor countries by the way).
So aside from your imagination, do you have anything else to back up your opinion?