There is an even more important lesson in this in that the people who worked on the bomb thought the world would be over in short order and were totally wrong.
Feynman talked about how there was an idea of "normal" people walking around not knowing they were basically doomed and going to die in a certain nuclear holocaust in a few years.
Von Neumann thought the U.S. should launch a nuclear first strike at Moscow. Obviously, if war is inevitable then you don't have to be the father of game theory to figure out you should strike first.
It was just a year ago that literally everyone was predicting we would be in a recession right now. We can't predict that but we can predict how AGI plays out even when we haven't bothered to define a measure of what AGI even is. Even people who grew up "knowing" we would all have sentient robots by 1997. I can't think of a single prediction I have heard in my lifetime that has turned out to be true other than the government debt going up.