It's a point of pride to fight tooth and nail arguing a wrong point. I worked with a guy who out right admitted that he will argue with you even if he knows he is wrong. It's not a discussion, its a fight they must win. They will die on their hill of macho pride. THEY MUST DEFEAT YOU.

Smart people admit they are wrong and learn, then move on for the better. The stagnant macho person will never learn anything and just wants status quo in perpetuity, so long as it benefits them.