The thing with Bluesky is that people want to believe.
You can go blue in the face pointing out that the decentralisation simply doesn't exist, and people say "hmm, well, benefit of the doubt, seems like they're working on it..."
You can give lengthy chapter and verse about how this is not a workable design for a decentralised system and it just doesn't get much response.
That's because people want to believe it, and so they do.