I think this might be a case of selective bias, as people who are rewarded for their efforts would likely prevent large scale accidents in the first place if their management listened enough to promote them.
You likely don't hear about this, because for these cases the oversight works and it's just people doing their jobs.
Oh, almost certainly! Failing to listen to warnings beforehand, and then after an incident wanting to suppress the knowledge that there were warnings, are very likely to be correlated. Not only that, there's usually a lot of money involved, and admitting company fault could be legal liability, or I would assume that's the fear anyway.
I'm just curious if there are any well-known cases of companies doing right by the people who tried to avert the accident, of companies admitting it was a management mistake as opposed to letting their fears / liability concerns / embarrassment steamroll the only people who did the right thing.
You likely don't hear about this, because for these cases the oversight works and it's just people doing their jobs.