When it comes to an engineer doing a dangerous job in a domain other than his or her own, I would say that all the engineer knows is how bad things can be fucked up when one is trying to do expert stuff outside one's own domain, because they've been in a position were they were the experts and some non-expert was saying things and trying stuff for their expert domain.

After seeing others do it in one's own expert domain one generally realizes that "maybe, just maybe, that's exactly how I look outside my domain of expertise to the experts of that domain when I open my big fat mouth".