Recording is not knowing, at best it is memorization of largely useless trivia. Sherlock has a good discussion on this (Sherlock solar system). To know something you have to have processed and at the very least achieved some compression of it.
Notes help with processing and thinking things through, aiding conscious and active understanding.
Unless recordings feed into one's process, they're a waste of space. Sturgeon's Law: The vast majority of what we encounter is junk, much of it even self-contradictory. The more you let into your corpus, the harder the problem of retrieval relevance.
My clippings are actively curated, carefully sized to fit in working memory while also independently comprehensible and guaranteed to have met my minimal standards on factuality. Because I have read them carefully before, I expand my mental canvas but am not slowed down too much by processing demands. The throttling on note growth means an easier time for information retrieval and much fewer irrelevant results to ignore.