Obviously, I think it's clear that no one would choose prostitution as a lifestyle for their child.
However, we also don't want our children to be fat, lazy, stupid, crazy, disrespectful, or hypocritical. You raise your children the best you can, and then you love them no matter what happens. We can't criminalize every behavior or profession we don't want our children involved in. Bookie, drug-dealer, lawyer, bartender...