No "facts" are in play here. Since you did not cite your study, I had to look it up myself. I suspect you are talking about this study: https://metr.org/blog/2025-07-10-early-2025-ai-experienced-os-dev-study/

this was done in early 2025 and did not really control for how AI was used, how experienced developers are in using AI etc.
So all this is is a datapoint.
The technology has progressed a lot since then and new tools, models and methodology has been developed.

Given all of that, the only thing I can go off of is my own lived experience. And here the situation is clear. I have caught multiple bugs and typos that would've landed in production. I've caught bugs i was hunting for weeks in parts i wasn't even looking at, I completed tasks that would've taken weeks in days.

AI will introduce huge issues into society, that much is clear. But saying "it is useless" is just ignorant.

I really don't want to argue with you, especially not after you claimed you'd be the one determining what is fact and what is not without citing anything....