Because non-tech knowledge, being harder to reverse-engineer, is harder to pass down. The main point seems kind of like Asimov's Foundation, keep from falling b

Because non-tech knowledge, being harder to reverse-engineer, is harder to pass down. The main point seems kind of like Asimov's Foundation, keep from falling back too many generations by leaving key checkpoint materials while cutting out some of the initially necessary but essentially unworking steps that we just go through to reach a solution (assumption -> oh this would be no that can't be -> ok reduction ad absurdum -> next possibility).