There is no expectation that everyone has to agree with you, either offline or online.
Egregious straw man, obviously I don’t think that.
enormous misunderstanding what [downvotes] are
Says who? You? What if it were you “misunderstanding” this? I know your version is the majority one, but there are plenty of people who agree with me that downvoting is toxic, hence the existence of downvote-free instances.
A downvote is softer than a negative comment, and if you think a downvote is a slap in the face, how should I interpret your negative comment? A kick in the face?
The big difference, to bore you with what you must already know, is that a downvote affects in most default configs the visibility of the comment. So it’s effectively a mild form of censorship, which IMO is not “softer” than a negative reply. And it’s certainly not better than than a constructive negative reply, which, believe it or not, is possible to do.
The best argument I have seen for your case is that downvoting provides an off-ramp for potentially sterile conflict. I.e. people hit the downvote button instead of replying with rage. That’s a decent pragmatic argument. But whatever reason I personally manage to control my rage at other people’s “wrong” opinions, so I don’t think it’s too much to ask them to do the same.
Not another one.