Exactly. It's the world wide web, people. It's about discovery and distribution and linkage. Centralization on this medium is not necessary; just convenient.
This is what the early net was like when I got on it in 1990/1991. I ran a personal UUCP node on my Atari ST. When I got a telnet connection, I went and found lists of MUDs and MOOs and IRC servers to connect to. I used Archie and Veronica and Gopher. When the WWW first came along, I used directory services like Yahoo, etc.
And then things got more convenient as Google, etc. came to dominate. And for a while the compromises that came with that were fine.
But systems like Facebook and Twitter are really counter to the networked spirit that drove the excitement in the first place. They want all the marbles in one place. I don't want to play that game, seeing how it's gone. I think others are seeing now just how bad it can get.
Mastodon isn't my dream system. I'd rather see something synchronous and dynamic and programmable... like LambdaMOO, but federated. But that ship sailed in the early 90s. I'm enjoying the bump in activity in Mastodon right now.