Because they're afraid of saying something "inappropriate" in passing and then facing charges or being sued for it. They can't talk about race, because of anti-CRT laws. They can't talk about "sexual identity" issues, like if little Tommy comes to school wearing sequins, is he being "girly". Can't say that. It's a sexual identity issue.
When everything you say or do is being scrutinized for crap pay, why would anyone stay in the profession?
Republicans have been intent on destroying public education in the USA since Reagan was in office. A good education is one of the "free shit" items that Republicans are intent on eliminating for poor people and minorities. You even have white enclaves in "urban" areas incorporating themselves as towns within the urban areas so that white tax dollars aren't going to educate their "urban" neighbours.
Efforts to form four new cities in Cobb County are still alive.
www.11alive.com