Not everybody learns in the same way. For myself, I get essentially nothing out of just sitting in a lecture hall listening to a professor drone on. It literally just goes in one ear and out the other. The only way I am able to learn is by reading and by working through the material on my own, either from notes taken in class or (preferably) a textbook.

So I can appreciate what OP has done here. I took notes in LaTeX for most of my undergraduate math courses (and some graduate ones), and I found it to be a fairly valuable exercise.