My extremely uncharitable view of of these kinds of people, who now infest the American AI scene, is that they got cyber bullied by domain experts for saying the most ridiculous crap on repeat, and have therefore decided to spend their life on eliminating domain expertise.

I wouldn't go that far. But as we've seen repeatedly, people who have enough qualms with how these labs operate just leave. And the people who stay behind and rise through the ranks are the ones with either very little conscience or some bizarre world view that rationalizes everything.