Maybe they're mature enough not to want that?
Sign up to protonmail.com for some privacy, to have your emails not read by Proton Inc., and quickly realize that most – if not all – your contacts are receiving your messages @gmail.com. All your emails will still be exploited by Google Inc.
There are good reasons to want the Fediverse to remain… diverse. Blocking isn't posturing, it's acting.
but uses an open standard
>owned by a large company
This doesn't contradict with the fediverse. Getting large companies on board is important for ActivityPub's adoption.
>and centralized
So is almost every other fediverse instance.
I mean, this bits not great.
Facebook didn’t write a fediverse compatible app because of warm fuzzy good feelings and wanting to contribute back to the community, they wrote one so they could capitalise and absorb the existing user base. They’ll do exactly the same thing they did with fb messenger at the beginning: massive interoperability with existing protocols and communities, followed by later deliberately breaking compat.
fool me once, shame on me
fool me twice, you can't fool me again