Totally agree with the point he is making. However, it is a much more intensive way of learning and probably requires a lot more comfort with the material than the average teacher has (that's just my gut instinct with respect to teachers in the US). I can think of a similar situation with essay writing. I remember the standard form for an essay in middle/high school was 5 paragraphs: 1 introductory paragraph with thesis statement, 3 body paragraphs, and 1 conclusion. So for everything you wanted to say you worked really hard to shoehorn into that form. The "find x" here is realizing what and to whom you want to communicate.