I understand your idea, but I think it would defeat the purpose of the fediverse. It would create single points of failure that are un-correctable.
I also think many people forget that Reddit never functioned any differently. Everyone seems to have forgotten (and I’m not saying you have!) that there are and were always multiple subreddits for any given topic. With slightly differing names. The only reason people are forgetting this is because eventually one or a handful became pre-eminent and the others died or became transformed into something more niche.
I think it’s a problem that will ultimately correct itself, but I think a tags based system, like hashtags in Mastodon, would be a better solution for tying communities/magazines together through metadata.
This is also how it works in Connecticut. While it may not be perfect, I don’t think it’s entirely unfair. It has the effect of a being a progressive social policy this way in that it is available for those who don’t already have it. Someday it like it to be carte blanche to everyone, but states doing this way is a solid start.