I lived with a priest once who said something like this. He even went so far as to omit the line in the Nicene creed that says "to judge the living and the dead." His idea being that wrongdoing already carries with it its just punishment.

On the other hand, there's an old thing written by a guy named Boethius where he makes the case that stopping a person from doing wrong is good for them, so even violence can be justified in such efforts. I may be screwing up what he said--it's been a while since I read it. But my takeaway was that he justified a whole lot of harm with this construction.

Probably, good life is somewhere in between. My experience of parenting so far has been that kids want attention more than anything else and acting out can most often be fixed by focusing on them for a little while.