The mindset gets embedded into teachers pretty early in their careers. I met my partner in college and was with her while she was a middle school teacher for years so I got the to see this develop in realtime. Education students need to have absolutely flawless records in order to even be eligible for hire. If they have so much as a drunk and disorderly charge on their record then they are essentially barred from teaching because the background checks are so stringent.
It largely depends on the age of students that’s in question, but you also have to remember that teachers are always at the mercy of the parents. They need to deal with a diverse range of religious, political, and educational backgrounds and try to maintain neutrality. Administration will almost always bend to a parent complaint - it’s largely just the way our education system is structured in the US.