I've noticed it over the past 6 - 12 months. I very rarely downvote a comment. I sometimes upvote two comments that disagree with each other because I feel bot

I've noticed it over the past 6 - 12 months. I very rarely downvote a comment. I sometimes upvote two comments that disagree with each other because I feel both of them offered interesting evidence or insight. OTOH, I often upvote comments because they are polite, reasonable and I agree with them. So, in that sense, my use of voting is asymmetric. Sometimes I think I should downvote more often just to use voting consistently. But, it seems extremely negative to do that to someone. Someone had an opinion and they expressed it. It can just sit there. Why should I try to suppress it? Maybe other people should be able to see it and react to it?