What class were you in to be taught that incorrect stuff from your OP? I can't imagine those professors and doctors would let it slide if their children were being taught such nonsense.
As for parents not getting involved, I'm not sure I ever told my parents about that stuff because I thought it was normal. Middle school was by far the worst part of the district, and a few years ago my brother and I were telling my parents stories about how about once per week there were school-wide riots in the lunch room that the FAs (bouncers) couldn't contain and we could do basically whatever we wanted for 30 minutes because of the chaos. It turns out my parents had no idea this was happening (my mom said she wouldn't have let me go back to that school if she'd known). We never told any parents because we thought every school had riots like that.