It's because it was short. You could have been short but particularly insightful, but your comment was not insightful (most people could "remember" "that one ti

It's because it was short. You could have been short but particularly insightful, but your comment was not insightful (most people could "remember" "that one time" someone with a coexist sticker cut them off in traffic or turned out to be a bigot). So that is all it is: a comment that people might agree with but provides low value to the reader in that context.