I've seen countless good comments downvoted on reddit and .world with no engagement whatsoever just because it didn't fit passing lurkers worldview, but is otherwise factually correct. Forcing you to comment instead of downvote, let's lurkers vote based on the content of the comment (obv this lays a burden on moderation, but is worth the tradeoff as it can foster really good discussions and higher understandong of the topic at hand)
Mainly because regardless of the vote being cast as that vs a general “I disagree”, it’s still an indication of disapproval of the commenter.
Here's the disagreement: one is a disagreement that allows you to vent without challenging yourself, the other is a disagreement where you know what the disagreement is about
The other side is: