This is why I'm personally not a fan of removing downvotes. No one really has been able to answer why upvotes need no comment to back them up, but downvotes for some reason always need a justification.
Many trolling comments, or some comments we just disagree staunchly with, should be downvoted, and no one should be required to write an explanation for that.
The other reason, is that all the big tech companies (except for reddit), have removed the dislike button. To me that signals that they don't want it to be known that some positions are wildly unpopular.
On twitter the only indicator of "dislike" now, is being "ratio'd": having more comments than favorites, which of course they prefer because it drives up engagement, since no one can just downvote and move on. It also makes some reactionary positions (like being anti-trans for instance), seem much more popular than they really are.