As any parent knows, if you tell your kids that something is harmful, they will stop immediately. No questions asked. I've never met a child who did something their parents told them not to do, have you?
> I support government protecting me from violence in some capacity
So, you do like big government telling people what they can and can't do, as long as you feel it directly helps you. That said, laws against violence don't protect you from violence, the laws kick in after the fact.
> I don't support "chat control"-like laws since the cost/benefit doesn't seem to be favorable.
Possibly because you don't have kids and thus maybe not a full understanding of the cost/benefit? Perhaps, instead of lecturing actual parents about what parenting is like, you could ask questions about the cost/benefit you claim to be interested in.