Because, most of the time, it’s not a competition of facts, it’s a struggle for point of view.
Here’s the thing: even when people making an argument know something, they don't like making arguments that appeal to the other person's alternative worldview.
People rarely take empathy into account. They like thinking about how they can improve their argument instead of using that emotional labor to consider someone else’s.
Which gives you a huge advantage—but only if you’re willing to have empathy yourself.