Communities are not fungible, but they are also not permanent.
Because humans are mobile, the community changes as people, institutions, infrastructure, and industries come and go over time.
Even if a substantial fraction of the population never leaves the geographic boundaries that contain the community they were born in, their web of relationships constantly changes as old neighbors leave and new neighbors arrive, the prevailing economy improves or worsens, and waves of technological revolution like the transition from horse-drawn carriages to automobiles washes over them.
Furthermore the community in which we live is only one of many communities we inhabit, such as school chums, work colleagues, church congregations and political movements, all of which are subject to the same phenomenon of perpetual change.
If every aspect of the community is impermanent, the community itself cannot be permanent, and I see no argument, let alone any technology other than encasing the community in lucite, capable of preserving it indefinitely.
In other words, forking punishes poorly managed projects by depriving them of some fraction of their developers, users, and mindshare, and that's fascism?
Let me get this straight: the author is angry that Disney didn't release a series of shitty Roger Rabbit sequels, prequels, and shared cinematic universe pictures with Pixar and Marvel, so he's re-taking his copyright in order to sell it to another studio who will exploit and debase his creative works more rapaciously?
BREAKING NEWS: the "Old Web" was far, far more than just blogs and feeds. It was full of bulletin boards and chat systems and listservs and other such "social" software artifacts inherited from BBSes and commercial timesharing systems popular for decades before the World Wide Web was even invented.
Blogging died IMO because its authors felt (and still feel) entitled to compensation for practicing a hobby, and started forcing advertising down their reader's throats as a means to extort them for money.