Because the large majority of them are liberal educated and follow the path of liberalism where there are 50 or more genders, we all piss in the same bathroom, and kill our unborn children.
It's a pretty simple explanation.
I would tend to agree that's also an issue just like the student discipline is, so maybe there are other issues that need addressing other than just funding and salaries that are being ignored if we want better results from our schools and kids?