> A common mistake (those who see themselves as) clever people make is that they believe that if you win an argument, you are correct.

You contradict this later by saying "We often care more about winning arguments than about finding truth." This is right - it's not that people think that winning the argument means they're correct, it's just that it feels good to win an argument. Winning does matter more than finding the true. Why? Feelings. Feelings govern everything. Life would literally have no meaning without the feeling tones that give it meaning.