In any case I think it makes me an unenjoyable person to be around. I more or less don't engage in opinionated discussion with people unless I'm intimately familiar with the topic at hand. Then it's no longer discussing opinions but trading facts. When I do engage, it's usually to ask questions of the other person's opinion without really challenging them. While I might agree with their opinions, I'm reluctant to refute them unless I can systematically prove them wrong. That's usually not possible, because they often know more than I do about any given topic. When I am asked questions directly I hedge my answers extensively.
When I was younger I used to take pride in this, but now I find it isolating. It's difficult to relate to people like this.