> why should I know anything

The obvious answer is "Because it's interesting."

But suppose you think strictly in utilitarian terms: what effort should I invest for what $$$ return. I have two things to say to you:

First: what a meaningless life you're living.

Second: you realize that if you don't learn anything because you have LLMs, and I learn everything because it's interesting, when you and I are competing, I'll have LLMs as well...? We'll be using the same tools, but I'll be able to reason and you won't.

I think the people who struggle with the question "Why should I know anything?" aren't going to learn anything anyway. You need curiosity to learn, or at least to learn a lot and well, and if you have curiosity you're not asking why you should learn anything.