I don't think people are intentionally adding friction, it just sometimes gets that way. Most people would be completely lost studying on their own. They exis

I don't think people are intentionally adding friction, it just sometimes gets that way. Most people would be completely lost studying on their own. They exist, however. But if most people could do it they would. And you are correct also about lectures lasting longer than most peoples' attention span. But they stem from a time when college wasn't for most people.