A universal property of state run schooling is that schools are literal prisons for children and for many people is the only place they'll experience violence first hand. The finer details will vary by location.
Both public and private schools can be places where people experience violence, but many more people experience violence at home first.
Rein it in, minuteman.
What more could you ask for in a prison?
I hope you never see a real prison. I'm serious about this. They are horrifying.
By the way, what do you call a well-treated slave?
It does happen, and if I did meet someone that was forced into slavery, I would hope that I could find help?
If anything I was defending public school? What the hell are you talking about?