Sadly it's what the parents today (who pay the tuition) are demanding. Hence "unique snowflakes" and "helicopter parents." Add to that a healthy dose of media sensationalism to a degree that never used to happen. Everything is drama, crisis, outrage, injustice.
Today? Old news. Decades ago, I grew up in a private Christian school with specially-oriented textbooks (e.g. "Biology for Christian Schools") to avoid exposing kids to information the parents didn't like. Heck, so did my dad (though his was less extreme than mine - more recently, when he discovered more of what the one he'd picked for me actually taught, he apologized... whoops).
Hell, what do you think white parents moving out of integrating school districts to keep their kids away from black students was about? Same damn thing.
