That's a really bad example because prostitution by itself is victimless crime. In fact, it's perfectly legal when money doesn't change hands! With gambling you

That's a really bad example because prostitution by itself is victimless crime. In fact, it's perfectly legal when money doesn't change hands! With gambling you have a winner and a loser, so all the other issues end up downstream necessarily whereas human trafficking (and other issues with sex work) is an enabling tool for criminals running prostitution operations.