The problem is this is an argument of what ifs. Who knows if Japan would have reconsidered if the US had performed a public demonstration, or even just made the trinity test public before dropping Hiroshima, so the Japanese knew what was coming if they didn’t surrender. Maybe it would have done something, maybe it wouldn’t. We’ll never know for sure, and all this arguing about the collective psychology of a large nation 100 years ago is never going to reach a point of agreement.
Yeah, nuclear is to fossil fuels as planes are to cars, safety wise. Sure it’s a huge deal when an accident occurs, but that’s because accidents are drastically more rare.