Fair enough, but we we can learn from the past and limit the harm that mismanagement can even do. For example, Chernobyl had so many preventable things go wrong, and even then it all had to happen at once. So much of that has been addressed on a structural level and with better training and procedures, not to mention that there are modern reactor designs that fail safe and won't meltdown at all.

We'll never eliminate the human factor, but nuclear power plants now all come with big concrete buildings around them just in case.