Historically, people did exactly that and collected info in commonplace books.

Growing up back then I owned a lot of books (and borrow vastly more for friends and libraries). I had a couple of bookshelves in my room, but my family home had at least a dozen full sized bookshelfs. So although I didn’t have access to the infinite info of the modern Internet, I read a lot of much more specific non-fiction books. There’s a lot to be said about having a deeper and cohesive understanding of a subject, compared to reading a bunch of wiki articles and watching a few hours of YouTube on a topic (although I enjoy that too!)