Agreed. In my case, I think I have found the opposite. At least, I find myself thinking hard about things more, now that I have started working hand in hand with AIs on different projects. Which is probably enhancing my cognitive ability, not degrading it.

This captures the problem, the sycophancy / preference optimization deludes people into thinking they’re on to something and posting things that don’t contribute to the discussion. It’s the “I drive better when I’m drunk” syndrome, it’s better just to outright ban it than to leave it to people’s judgement.