So the smart get smarter and the dumb get dumber?
Well, not exactly, but at least for now with AI "highly jagged", and unreliable, it pays to know enough to NOT trust it, and indeed be mentally capable enough that you don't need to surrender to it, and can spot the failures.
I think the potential problems come later, when AI is more capable/reliable, and even the intelligentsia perhaps stop questioning it's output, and stop exercising/developing their own reasoning skills. Maybe AI accelerates us towards some version of "Idiocracy" where human intelligence is even less relevant to evolutionary success (i.e. having/supporting lots of kids) than it is today, and gets bred out of the human species? Maybe this is the inevitable trajectory: species gets smarter when they develop language and tool creation, then peak, and get dumber after having created tools that do the thinking for them?
Pre-AI, a long time ago, I used to think/joke we might go in the other direction - evolve into a pulsating brain, eyes, genitalia and vestigial limbs, as mental works took over from physical, but maybe I got that reversed!
But, we still have the System 1, and survived and reached this stage because of it, because even a bad guess is better than the slowness of doing things right. It have its problems, but sometimes you must reach a compromise.
Like kids who are never taught to do things for themselves.