I once saw a comment that said "AIs are great for things that are hard to find, but easy to verify". Which I agree with.

In order to verify, we need knowledge.

If the AI is the last stop ("I asked my LLM and it said that"), it's the wrong way to do it. If the AI is part of the process ("The LLM mentioned this, which made sense, and I confirmed it by [...]"), then it may (or may not) be useful.

In any case, "knowing it" is always more efficient than "having to search for it". So the more you know, the better.