The best argument "against prostitution" is the moral argument against consuming it: you don't and _can't_ know if the person you're paying for is too poor or too wasted to be able to choose to participate, or if they're being threatened with violence into participating by a pimp, for example. Coerced sexual activity with another person is r-pe (as opposed to, say, working at Burger King, which might be coerced by the need to survive but is not r-pe.) Enjoying r-pe is wrong.
If you don't think coerced sexual activity is r-pe, or you don't think that enjoying r-pe is wrong, the argument falls apart, of course, which is why this comment section is the way it is.
If you don't think coerced sexual activity is r-pe, or you don't think that enjoying r-pe is wrong, the argument falls apart, of course, which is why this comment section is the way it is.