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.
Frankly I also browse by “Subscribed”. However that is not an actual solution for the problem, unless you have a sensible way to encourage/force other people to do it.
Multiple feeds (a la multireddits) is a great idea that pops up often. I hope that the devs are at least considering it.
The solution doesn’t need to be perfect to be useful. So even if posts within a grey area get tagged in a way that reaches a wider audience than they’re supposed to, it’s fine.