About downvotes being disabled in non-Beehaw communities

I understand Beehaw's policy on downvotes: I've not thought of it long enough to say whether I agree or not (well, I guess I should also study some psychology and sociology to really form a meaningful opinion on that), but I have, in principle, no problems with it.

However, in some communities that are not on Beehaw (and thus not necessarily agree with Beehaw policies) user downvotes work as kind-of a "soft" moderation and I feel like I could better contribute to those communities if I could downvote posts/comments that I find distasteful or inappropriate but that the mod won't remove (I know I can just reply with a reprimand, but that's a lot of work and doesn't reduce the reach of the inappropriate post/comment).

Now here's my question: are downvotes being disabled on "foreign" communities because of some technical limitation or is the idea that Beehaw's users should not be able to downvote, regardless of how communities may work?