Of course, the widespread vilification of prostitution (and pornography etc.) is about sex. The traditional price of sex for a man is lifelong marriage, i.e. feeding the woman even when she is no longer attractive. Prostitutes are price cutters, they would be even cheaper if they were not brandmarked socially. Similarly, porno shops and their customers are being derided.

These ideas, much older and more widespread than Christianity, can be called conservative, i.e. striving to stabilize existing ways of society.

Feminists may emphasize that they do not need men at all, but still appreciate being highly priced.

Thus, complaints about exploitation are mostly pretexts. (There are other such pretexts and also good arguments.) Exploitation is certainly a real problem, but it is actually fostered by forcing prostitution into "demimonde".