You'd think that would be the case.
As it is though, the world is in fact the finest example of the destructive nature of the defective ego. People are often hurt/embarrassed/upset/shameful after making a mistake. There is no problem with that at all. The problem is how the "wounded party" responds. If you were to make a mistake, admit that you were wrong, and then be mocked/belittled/abused by the wounded party for being, say, being bloody stupid in the first place, that might make you resentful of ever having made the mistake and ever having apologised for it. The apology just brought more abuse.
Lots of people grow up in families or environments where aggression exists where humility should. The problem is that this is self-propogating.
P.S. I hope that didn't sound too much like a rant.