Which is, imo, pretty dumb. If it gives these people an outlet that literally hurts no one, I say they should be allowed to use it. Without it they’ll just go to more extreme lengths to get what they need, and as such may go to places where actual real life children are being abused or worse.
So while it’s still disgusting and I’d rather not think about it, if nobody’s being hurt then it’s none of my business. Let them get out their urges in a safe way that doesn’t affect anybody else.