Look, both my girls just graduated from college, one from Utah State and the other from Stanford. They never saw such a thing even once. For the latter, her upper division courses didn't even have textbooks because the science moves too fast for one to be relevant. What you describe happens in "science" classes for non-technical majors, but not in core courses for science degree programs anywhere of which I am aware.
What your kids took or where they went doesn’t matter. I am happy they had a good teacher. Whether you never saw it happen does not negate the reality that it does happen.
If it doesn’t then pray tell how we have so many scientists totally unfamiliar with actual science? You don’t think AA kicks through scientists just like it does journalists?
Spend some time talking with ex teachers who left the system because they couldn’t deal with this crap.