Banning sex work is about as successful as banning drugs. All it usually does is lead to more misery for the sex workers. Which is entirely the intention, of course.
Let’s not forget the other side of the equation, a lot more people would try drugs if they weren’t illegal. Which is a good thing, because learning about them helps all of society.
My experience as an addict tells me more people trying drugs isn’t necessarily the best thing they can do for their lives IMHO.
I don’t know if it’s true that making drugs legal means more people try them. It might make sense in a certain sort of way but I’d like to see data before accepting it as truth.