But I also completely disagree with his take, it's too broad and sweeping.
Offloading some cognitive load does not suddenly make people stupider. It just means that their focus can go elsewhere. Nor do tools that abstract away some processes.
A good example is driving. Does a manual transmission require more focus and thought? Sure! But that's focus and thought that can instead go into paying attention to surroundings. Same with having a GPS. Not having to think about the layout of the city, or how to use a map, just leaves less distraction and cognitive load.
Another is programming. Having high-level languages instead of having to write assembly does not make programmers worse. It just means that instead of having to worry about byte alignment, structure packing and nuanced cache details - they can instead focus on providing more features and functionality to the end user - which is a good thing!
ChatGPT at its best will be like those two examples. Something that removes some existing load and lets us handle higher level, more abstract problems.