I agree with the sentiment, but would disagree with “about half.” The world still needs doctors, lawyers, architects, etc.About half the people in “college” should be in a trade school.
Better for them, their families and the schools.
I do think some schools have been strategic about what they offer and students and families have been smarter about what they spend tuition dollars on. I don’t have a link to back this up, but I’d guess there are fewer Philosophy-type majors than there were a couple of decades ago.