I think things can still be relevant to a community and be disliked. At the moment this is mostly an art sharing community, but I saw some talk about creating subcommunities revolving around nsfw discussions and recommendations.

While I doubt downvoting would be used much, I can see it filtering out low effort content or show disagreeable ideas in discussion based communities. Because of that, I dont see an immediate reason to remove this feature.

I also like the idea of a community having slight self governance to take some of the burden off the mods.