Nearly every animal with a brain has young that misbehave. Mama kangaroo, elephant, tiger, horse and chimp will put up with a certain amount of bad behavior, eg overagressive play or taking too much food, then they’ll grunt, then a growl, and then when bear cub keeps it up, Mama bear nips just hard enough to get them to stop and hopefully not do it again.

We’ve abandoned something that’s been at the core of nurturing the young for 60,000,000 years. I would assume there’s been a fair amount of natural selection at work in a fundamental aspect of the parent-child relationship. I think choosing not to teach that “when I say stop, stop” without thinking that it will not work out for a meaningful fraction of the population, seems a bit like trying to figure out what the Boeing MCAS engineers were thinking.