Clearly you have never been a child care provider. In fact, when Jack is an ahole to Diane, he gets removed from the group for a time out. If Jack has a nasty habit of physically attacking Diane - or any other child - or the care giver - he gets kicked out and Mommy has to find another place to stow her brat. If the brat isn't removed, the other parents remove their children, and Nanny doesn't want that.
Educators are not care givers. That's not even remotely in their job description. They do not feed the kids, they are not responsible for their safety, they do not change diapers or potty train or do any of the things child care workers do. They are there to educate, period.
You appear to be making the case that teachers are nothing more than slaves who must tolerate all manner of workplace abuse, and I am telling you flat out that that's not true. Teachers DO have power. They CAN make a difference. But they choose not to in these situations, and I'm not sure of the reason. I can't think of any other profession that would tolerate workplace violence and disrespect the way teachers do.
My criticism of teachers is that they don't stand up for themselves and the kids in their classroom against the bureaucrats. On one hand, I feel for them and have sympathy for their situation. On the other hand, they could change that if they wanted to. They railed hard after the 2016 election - "OMG, what will I tell my kids??" - and yet they seem to have no responsibility when it comes to the real world safety of those kids; just the imaginary danger of "the Republicans". They think President Trump is going to kill everyone, yet turn a blind eye to the bully kid who actually terrorizes the students on a daily basis.
That's the truth. I've seen it myself. You don't have to like it, but it's still the truth.