I have a friend who does this. I tried explaining to her that she's doing it wrong. She told me I'm wrong and she won't discuss it further. I don't get some people.
Most people hate being wrong, or corrected. They seem to see it as an affront to their very existence, and will often fight back tooth and nail when confronted with any evidence that the things they believe about the world might not be 100% correct.
Source: Any substantial comment thread on any social media platform, ever.
People who are readily willing to admit they're wrong and learn why, and on the flip side be able to correct others in an educational/non-condescending way, are the best people.