it’d basically solve the issue of duplicate communities too

There’s no “issue” with duplicate communities. There’s an issue with Reddit users wanting there to be a single canonical home for a topic on a local-first distributed network of websites.

This isn’t Reddit. This isn’t like Reddit. It doesn’t operate like Reddit. It just kinda looks like Reddit. And maybe it shouldn’t, because it anchors people’s expectations and prevents them from embracing something truly new and different.