We tend to be extremely overconfident in our knowledge and it usually takes a few disasters for new technologies to stabilise such that we don't regularly hurt

We tend to be extremely overconfident in our knowledge and it usually takes a few disasters for new technologies to stabilise such that we don't regularly hurt or kill people. It's one reason why we should be extremely cautious in adopting new medical techniques. It should be at an almost glacial pace. That's all I'll say for now for reasons you can probably figure out.