One of the kids in the video says "[In college], I was challenged in things I am not interested in, but not in thins I am interested in." That's the whole point. Stepping out of your comfort zone may even be the single most important life skill. If you cherry pick the stuff you want to work on, you will never learn something new. College is a good place to learn how to hammer through "uninteresting" stuff.
I don't believe there is a definitive answer to that. Everyone is different. Some learn better in the classroom, others learn best on their own, and I'm sure there are a million variations in between.
And that's the whole point. Government has decided that there is one answer and put its financial and bully pulpit thumb on that scale. That's how it creates most of its bubbles.