I just don’t see why Joe Public will ever care about decentralisation as a concept.
We tend to hand wring about principles within the tech sphere, when the bulk of people just want a place that won’t make them feel immediately (longer term doesn’t matter) crappy when they use it, whatever that means for them. That tends towards centralisation because decentralised services have awful moderation and tend to create an even stronger strain of groupthink.
I think Bluesky exists to demonstrate that people want the features that come with centralization without the oppressive platform lock-in. If Bluesky's moderation, TOS, UI, default feeds, etc. are intolerable to you, then you should be free to move your content and your network to an app with different moderation, TOS, feeds, etc.
Bluesky isn't marketing itself as a decentralized platform because it's not. It's an opinionated view of a decentralized network, and others are free to use differently opinionated views or make their own.
> I just don’t see why Joe Public will ever care about decentralisation as a concept.
IME they do care, but they have no patience to deal with the hurdles that decentralisation imposes upon your user experience. So ease-of-use and convenience always win.