To the credit of Americans IMO. Ego is quite common among high achievers and often beneficial as a motivator or confidence booster. Unexamined and disproportionate egos are self punishing as they directly harm chances of success. AFAICT any additional social stigma accomplishes nothing except perhaps the soothing of egos by less successful people. There are real disparities in ability & quality between people for which proven success is the strongest (and perhaps the only real) signal.