For thousands of years, virtually all educators were devoted to teaching facts and knowledge. So-called Progressive educators seemed to realize they did better when the students and the population were relatively ignorant.
So K-12 education became a hustle where schools pretended to teach traditional subjects, but in fact undermined that teaching. And that's why Charlotte Iserbyt coined the phrase "the deliberate dumbing down of America."
This short podcast explains why so much that seems incomprehensible in K-12 education is actually quite logical to the people in charge.
Who Can Control the Control Freaks?