i wonder if people who use llm's for business critical documentation would have the same opinion, and if so why?

I have used LLMs for safety sensitive tech writing and so have people I know. It’s pretty good at it, and you usually have a 95% ready to go product at the end of it. The last 5% can pretty easily be filled in by technical experts with way less time spent battling the type writer.

Is it perfect? No. But it suffices most of the time in a pinch.

Can’t speak to the nuke industry, but it’s pretty good at aviation related things.