> I learn a tremendous amount from Twitter and vastly prefer it to needing to buy a book
Is this "learning"? You sure get entertained, quick-and-easy-to-digest facts, good for short attention spans, and 5-10 minutes later you go back to whatever else you were doing. Or hop on the next "educative" twitter thread or somesuch. But have you actually learned something?
If I ask you a week later to summarize your new insights, will you be able to? Will you even remember that you read about this? I sometimes find an old tab in a browser window that I had forgotten to close a while back. I skim through the contents, oh right! That thing! That was interesting! Turns out, a twitter thread, barely a week old, about something interesting, "I really learned something!", but I had already forgotten about it again, and if somebody had asked, I'd mainly have answered "Oh yeah there was this thing, don't remember the details, or the conclusion, or anything really, but I think I read something the other day", which is just hot air.
We should not treat such twitter threads as educational content. They are short-term entertainment, and good at that, but in essence not very different from a tiktok clip of some girl dancing on the beach.
If you really want to learn something, you need to invest time. By reading a book, by discussing with knowledgeable people, by trying something out yourself and/or trying to put your own words down. This takes energy, patience, time and can be frustrating at times. But twitter threads can't solve this for you.