Maybe because you like arguing? That's not a bad thing. It allows you to hone your mind, find new evidence, and compete. There are also the social rewards that come from a lot of people being on your side against an outside force -- which, Fred's railing against "tribalism" notwithstanding, is not a bad thing.

Now that I have more spoons most days, sometimes I go back to Slacktivist when I am in the mood for semi-difficult socializing, because I know there will always be something there for me. It's good to stretch onesself, I think. Maybe you're doing something similar? Sometimes the response to a mountain is, "wow, that's a tall mountain." And sometimes it's, "I'm climbing that thing, I don't care how tough it is."