Its a little disingenuous to say that, most of us would have never gotten by with literally just a library catalog and encyclopedia. Needing a community to learn something in is needed to learn almost anything difficult and this has always been the case. That's not just about fundamentally difficult problems but also about simple misunderstandings.

If you don't have access to a community like that learning stuff in a technical field can be practically impossible. Having an llm to ask infinite silly/dumb/stupid questions can be super helpful and save you days of being stuck on silly things, even though it's not perfect.