It’s like running IT in a company. If things go well people are asking what you are doing the whole day. If things don’t go well you get the blame.

really, this isn't different from any job, and not evidence that that it was not a case of "you only had one job!"

Not sure what you're saying here, is it that you got out because your boss was incompetent and delusional, or you got out because he was effective but you needed some sort of external validation despite your work being effective?

Very confusing comment, whichever is true.

I understand that is saying that their good job was not appreciated, but the eventual mistake was always criticised so they just can't win or keep a positive image of themselves. Sounds like a draining job.

On the other hand, claiming that "We didn't see it coming" is the safer and more logical public reaction for most cases. The opposite "We knew that this would happen" is a mine field.

If they knew it; there is an informer. With enough repetitions or forcing rare events to test the reactions, anybody suspicious could be disclosed as mole. And if they knew it, but didn't do anything to prevent a disaster, the public outrage wave would hit they really hard. Better to pretend to be dumb.