Except Guitar Hero is a game, and is marketed as such. Guitar Hero is like Bitcoin mining, you are doing useless computations to make some number go up, in the case of Bitcoin, your money, and Guitar Hero, your score.

But AI actually does something unlike Guitar Hero. There is a real output that can be used tomorrow even if AI "goes away".

You say AI helps you learn no skills, essentially. I don't know about you, but AI helped me understand Linux better in a way I didn't feel confident I would be able to before AI. I have created code with AI that I can maintain, and understand without it.

AI can go in conjunction with learning manually and can be helpful. Just because many examples exist of AI being unhelpful does not mean the whole technology is unhelpful.