By randomly browsing a discussion on !fediverse@lemmy.world, I just realized I wanted to come back to the real use of downvotes (which was first a user-level moderation about spam, and actually shouldn't exist anymore as we now have the report button).
So I'm back here on Reddthat, happy to use an instance without downvotes!
It's truly the way it should be. If someone is making a bad argument, prove it in the comments. If someone is a turbo-bigot, report them. Drive-by downvoting is lazy commentary.
Also, it's just better for everyone's mental health.
The appropriate use of downvotes seems to be a divisive topic. I guess different people can try to use them in different ways, and that instances disabling downvotes will find their niche somehow.