Nah, some of us are entirely well aware of the fact that we're just plain evil. It's just that, at a certain point, you look at the things that the vast supermajority of the human race consider Good and Virtuous, like noble kings who pull swords from stones, hard labor on farms, and their local army. Then you look at the things the vast supermajority of the human race consider Evil and Scummy, like democratically-elected officials, premarital sex, video games, and peace activists.

And then, you realize that judging by the set of things you found appealing, you must be Evil, and you might as well embrace it.