I'm not sure there's always a more efficient way to find that same information. If you already have a question, sure, you can look for an answer. Sometimes you stumble across a post about something you hadn't even thought to look into, though. I think that's part of what he's talking about when he mentions finding things that changed his life.

If you are browsing, you aren't searching for any specific piece of information. You're just looking at whatever is presented to you via whatever algo in use. In this case reading a book would, IMHO, be better. You stumble across all kinds of interesting pieces of knowledge, thoughtfully written prose, facts (in some books), great stories and characters in other. Though I do now have to condition this with; books written before say 2022 to stay clear of AI slop books that are flooding the space as we speak. Those books are worse than browsing the internet.