OK, let's slow down for one secounf.

1) if you re-designed it with complex multiplication problem instead od writtng tasks, and calculators instead of chat gpt - and chamge nothing more - you would get exactly the same result. If you reduce the challange to minimum, how do you expect brain to respond?
2) The "we have this not-reviewed singular study based on 50 people" we should raise the alarm NOW" is every sensational.

There are so many problems with AI, and we need so many checks and balances. Sure. But let's not change it into another "our pop-science vs their pop-science" kind of problem.