I think he is trying to say that we all have swelled heads and are too smug to learn from others mistakes. Possibly true. I have learned a few things on here that I hadn't considered before. I've learned a few more from coming too darn close to getting myself flattened as well. I know which way of learning things that I prefer.

Unfortunately, the cold dispassion of considering what others did wrong is nowhere near as good a teacher as a good hard shot of adrenalin.