While I fall on the other side of this debate (I'm pro-federation with Meta), this article helpfully distinguishes between people's conflicting priorities. For some users it's important to defend Mastodon as a community and a set of social norms. For me the goal has always been wide adoption of the ActivityPub protocol. Mastodon was just a useful way to kickstart adoption, and Meta adopting it would be a huge boon to the protocol.

I'm not personally very interested in a small community of like-minded people on a mini-Twitter. I want a mega-social network linking multiple services, including big corporate ones and small community-run ones, like email or podcasting (as someone else here mentioned).