This is the equivalent of saying that MS Outlook is a community. It's not and neither is Lemmy. Each server has its own rules, and each community on those servers can add rules beyond that.
Address a specific community or server, there's no central control over the fediverse.
But what about all the real valuable assets these companies would have these days? Like the multitude of 5 year old PCs, 1990s era Hermann-Miller office furniture, the buildings and land they lease... /s