I'll ignore this conspiracy theory, painting those wanting defederation as some social media giants psy-op, to get to the same underlying problem we always come back to: not wanting others to decide what we can or cannot see.
The fact is that we are merely borrowing space in someone else's home: they pay the bills, clean the space, and decide the rules that guests must follow; it's their place, we don't have any right to dictate them how to keep it. The only way to have absolute freedom regarding the content you can consume would be to build your own place, I.E., your own server, which as the analogy implies isn't the easiest task, and requires some means and knowledge.
In the case of your instance, the admin has decided to let the guests decide on the modalities of housekeeping. A significant amount of people have made their wish known, and aren't satisfied by putting a folding screen in front of their problem. Like it or not, on an instance ruled by its users, that's something that will need to be formally addressed at some point.