Bluesky user count is the same order of magnitude as Mastodon and is centralized. I think your argument is actually that if you are on a minority platform your wants and needs for how that platform operates are irrelevant. I suppose that's true if you aren't on the platform, but I don't think it's true if you are.
But since essentially no one is using it doesn’t suggest much avoidance of centralization. These factors are not independent. It’s pretty easy to avoid anything when your total user count is a rounding error compared to the alternatives.