Because inner insecurities make them force an image of their ideal self onto other people. Simply, if a man really wants to be a great musician, he will naturally strive to do so, and in doing so, he will judge others based upon his standards.
Humans have a difficult time seeing into eachother's minds, so it is natural to push one's standards upon other people.
A quiet woman will view loud women as annoying, or excessive, whereas a loud woman will view quiet women as too quiet or secretive.
Jep-Jep
