By default, Lemmy allows downvotes globally. However, when a server disables downvoting, it is similar to using a feature that is usually reserved for enterprises and very small, non-federated communities.
If a user prefer to not see downvotes, they can disable it by his favourite client settings, but the rest of the community should not miss this functionality for the pleasure of few users.
I would downvote this comment also if I could, but sadly my instance disable downvotes. (◕‿◕)
I did it! Maybe i should start a special downvoting service for the poor downtrodden commenters whos got no DV of their own