In my own personal opinion, spending time arguing over who is right is a pretty damned poor form of social interaction.
I never thought of it as arguing over who is right, honestly, because nobody cares who is right. It's more like a puzzle-solving exercise used as grist for the conversational mill.
When i was a witness of such conversations, pretty much everybody tries hard to show that they were right.
Because it's not about getting answers or determining facts. It's about the social interaction.