as somebody who upbears everything they see before I even read it (and then removes it if I dislike what the person is saying) whenever I get into mini-debates on here and the other person doesn't upbear my comment before replying, for about five seconds I perceive that as "fuck you, 72T." before I then realize that many people are like you and just don't upbear things that often.
I guess it's just a holdover from reddit culture where you'll see a comment thread 50 comments deep where both commenters have 0 votes on each comment because they're both downvoting each other, and on here, not voting is the closest thing you have to a downvote