Whether it’s a sense of superiority or just to be funny or asinine or out of a genuine need to spread the truth, people online generally try to be contrarian as often as possible because it gives them some sort of personal gratification or a sense that they’re correcting something wrong in the universe.
I’d love to disagree but it feels like falling into a trap.
I would say that arguing is entertaining and intellectually stimulating. It should not happen at the cost of being a dick though.