[vidarh]

This argument tends to come from the exact opposite viewpoint of Marxists. Part of the issue is that prostitution is often "in your face exploitative" (I'm not suggesting it always is), and because it often is, a lot of people are very insistent on making it into a moral issue where it can't be anything but exploitative, because the alternative if you allow yourself to accept prostitution as "just another profession" among many that can also be dangerous, exploitative, uncomfortable, and so on, is to accept that "normal" occupations can also be exploitative, and that's surprisingly hard to swallow for a lot of people even if you don't go anywhere near all the way to a Marxist "all labor is exploitation" line.