Earlier quoted context omitted.
How is this private? As far as I'm aware, federation tends to be opposite to privacy because there can't be centralized control of access. e.g. none of the federated social media support private profiles but Instagram does, so Instagram is actually more private than most of these.
"Privacy" here means "no big tech will be tracking me and trying to shove ads down users' throats", not that the published content is protected from public view.
For example, in Bluesky, which users you blocked is public information.
To me, this sounds like a bigger "privacy" issue than "the ad company figured out you're a man who lives near the beach so you get ads about surfboards."
Privacy is about control of your data. Control requires centralization. How come people think decentralization is good for privacy? This is a very narrow definition of privacy that doesn't matter for most people.