These issues with AI are arising faster than ever, but no one seems to stop an extrapolate the inevitable end result. What do you do when an AI can realistically handle your average college student's entire course load? Existentially, does it even matter? Yes people will be dumber on average, but will they care if they have the answer to all of life's questions in their pockets?
I'm old enough to remember people telling me I wouldn't always have a calculator handy, and obviously that didn't age very well.
It sounds unnecessarily pessimistic in the face of all the things AI will help us with, but given what we know about human nature, I do expect AI to make us a lot lazier and ... dumber.