It is disgusting that there are people that would do this, but there are tons of “problems” in our system that allow this to continue.
Blaming solely the purchasers is dangerous. It takes the parents, the kidnappers, law enforcement, law makers, and individual citizens off the hook, which are a lot of people who could make strides to improve this situation. The law regarding prostitution that allows this specific trade to be profitable yet hidden and thus unregulated is very much at fault, too.
Taking away accountability throughout the system, and placing all blame on the purchaser isn’t going to solve the problem.