There is an assumption being made here, and that everyone learns in same or similar ways, making it necessary for this sort of content to slowly sink in.
While true, it is not a replacement for a 4 year college, not everyone learns the same way. For me, I can blow through an MIT course at an accelerated rate and retain most of it, but that's because I made a hobby out of meta-learning for a while and really got into effective ways to learn.