I might be able to help you understand why they're so scorned. In the old days, when it was legal, some "women" were as young as 12. One of the few things the progressives got right (IMO) was to end society's abuse of children (if not the private family's abuse of them). Medical issues abounded due a lack of knowledge of microbes, parasites, virii, as well, and many hookers spread diseases. To combine the two, it was a belief that one way to cure STDs was to have sex with a virgin, many of whom in that profession were severely underage. Some women were forced into it by circumstance, and it was seen by some as a form of slavery. In more modern times, it's a situation that feeds on itself. We don't like *****s because they bring in crime because they're run by criminals, and have to be because prostitution is illegal. These days many of them are criminals in their own right, drug-addicts who bring in the dealers, or else they're mules who shuffle the stuff from one pair of hands to the other.
I don't believe there is a single study that can prove that prostitution "leads men astray". If they're going to rent a hooker, they were going to step out anyway. I say legalize it, but keep it away from places where families would go. You know, like liquor shops, smoke shops, and porn shops are supposed to be a certain distance from schools, etc. You can't make sex illegal.
(Hmm, interesting cencorship there. The disparaging term "hooker" is okay, but the classic name of the profession, which rhymes with "bores", isn't?)