The university model of education requires students to do the majority of the learning on their own, and most don’t know how. They’ve spent four years spending 35 hours a week in a classroom where the teacher tells them what is important and what will be on the test. Then they go home and cram to remember that information long enough to pass.
Then they go to college and take 4-5 classes about 3 hours long. They think it will be a breeze (12-15 hours), but those courses are condensed. Instead of a year, they are learning the same amount of material in a semester. Professors don’t ‘teach’ the material, they use class time to reinforce what students studied on their own in textbooks and videos the prior week and answer questions to clarify understanding and show correlations between different pieces.