Irrelevant? It's my entire proposition in no absolute terms. Of course everyone is stupid and anyone with a modicum of critical thinking skills can understand this. My point was that it is often difficult to accept criticism because we're pressured to believe we need to be the best or at least better than everyone else we see ourselves competing against. Criticism then seems like a personal attack and makes it difficult to accept since it can lower your perceived position amongst your peers.

Humility is the easiest solution I put forth. Once we realize just how stupid we are we can look at criticism as a chance to learn something and improve ourselves. And maybe when we give some criticism we'll try to be more thoughtful and be constructive.