I've heard that the human trafficking numbers increase with legal prostitution since volume increases also, even if the percentage is lower. The Netherlands has huge problems with drug smuggling and human trafficking despite both being largely legal there.
While I don't disagree that prostitution should be legal, it's a bit more complicated than the utopia you just painted.
While I don't disagree that prostitution should be legal, it's a bit more complicated than the utopia you just painted.