I think it’s fun. Sometimes trying to explain something to someone who disagrees with me helps me better understand exactly why I believe something. It’s easy to grab some opinion, but it’s not always so easy to back that opinion up.
True, I’ve never gotten anyone to change their opinions, but I’ve changed mine before. But not because the other person made a great compelling argument. Usually, it’s because someone’s said something, I tried to refute it and couldn’t think of anything on top of my head. Then I dug around and did some research—and it turns out they had much more valid points than I did.
I don’t really argue to change someone’s opinion though. That’s pointless. The best I can hope for is that even someone who totally disagrees with me will maybe somewhat agree that anyone who disagrees with him is an uninformed yob who just picked that opinion because it simply lined up with their political party, religion or whatever. Or they think that you didn’t take their opinion because you never gave the issue any serious thought. I don’t want someone to change their mind more than to say “Oh, yeah I can see why you’d think that was true… maybe…”
I have a lot of my dad in me, who I recently mentioned in another question, He LOVES to pick everything apart into tiny bits and over-analyze every single aspect of his life. He rarely simply has an opinion of something, like he prefers apples over plums. He’s got several pages and hours worth of reasons to explain exactly why the apple is the best choice, the history of how this came to be the best choice, the science of why this is the best choice, the political ramifications of this being the best choice, and why you need to THINK about why you prefer an apple instead of just accepting it… He hasn’t actually done that one, but I wouldn’t be shocked or surprised if he did.
Sometimes I re-read something that I wrote to someone and I think “OMFG, I am my dad.” And then I feel kind of sorry for the poor guy who simply asked some question about cheese.