Except they’re not.
The studies done by the trained psychologists in this joke show that little kids don’t associate being hit with the thing they’ve done wrong. Very small children only understand consequences that are directly caused by the thing they did. Steal a biscuit, biscuit tastes good. Then for no reason mummy hit me. Very different to stole a biscuit, now no biscuit after dinner because I stole a biscuit.
And they also show that when a child is old enough to understand why they are being hit that non-physical punishment is equally as effective and less mentally harmful in the long run.
Do you know who benefits the most from hitting as a punishment? The parent. It gives a satisfaction rush. Parents do it because it makes them feel good.
Basically kids have two stages: too young to understand why they are being hit so physical punishment is useless for anything other than teaching a child that bigger stronger people can hit you whenever they like (Which sounds like the same lesson you would learn from abuse)
And the second stage is old enough to be reasoned with so many punishment options are available and you chose physical violence because it makes *you* feel better, which is an abusive action.
The only time a person should ever use violence against another human being, of any age, is to stop that person from being violent themselves.
