Very much agree with you. My own experience with calculus specifically is that I would attempt a problem or example myself, then review the solutions and if I'm

Very much agree with you. My own experience with calculus specifically is that I would attempt a problem or example myself, then review the solutions and if I'm stuck, I would not understand a proof or solution unless I copy out every single line as the lecture/textbook and even add to it. The act of slowing down to ensure every line makes sense to me is one of the most valuable things for my learning.