I think the community subscription model in the article fixes this (imperfectly). Pancakepurists@a.com can have strict rules while pancakeparty@b.com could subscribe to it and pancakepurists could subscribe back with the understanding that the rules are slightly different there. Pancakechaos@nazi.assholes could similarly link to both those without either having to be mutually interactive.
I think the problem comes from some increased moderation loads by allowing a community to follow another. If I were to put on my paranoid hat it could be used to monitor and brigade a community. I think the solution for that is moderation tools. Banning instances, federation etc. I'm not a mod anywhere so I don't know what is possible.
holy crap there is a starlink alternative? Do they work in the US? I would love high speed internet at my house but Im in the sticks I get the most attenuated DSL signal allowed. Last I looked into starlink there was concerns about the long term viability of the technology. If I remember right, the network would get congested pretty easily. That plus Musk had me shying away, but if there is an alternative....