Being an asshole is something you can only be as a result of interaction with others in some way. A perfect hermit can’t be an asshole. Therefore, assuming being an asshole means your interactions with others are negatively felt, you’re therefore imposing your will on others at the expense of others. It’s fundamentally anti/democratic and anti-social. The reason that’s important is because we live in a society and well functioning society requires its members to play nice. Otherwise it begins to fall apart. In other words, I’m saying you should logically choose to not be an asshole. Assuming of course you gain some benefit from being part of a functioning society.