Nostr doesn't have a CEO, a single app platform, or an easy way to censor/moderate content. According to the Bluesky CEO, this is why the Bluesky model is better than alternatives:

"Centralized social platforms delegate all moderation to a central set of admins whose policies are set by one company. This is a bit like resolving all disputes at the level of the Supreme Court. Federated networks delegate moderation decisions to server admins. This is more like resolving disputes at a state government level, which is better because you can move to a new state if you don’t like your state’s decisions — but moving is usually difficult and expensive in other networks. We’ve improved on this situation by making it easier to switch servers, and by separating moderation out into structurally independent services."

Is Bluesky better than Twitter? Absolutely. Is Bluesky better than Nostr? I don't think that's the case as there are still gatekeepers on Bluesky and it's not truly decentralized or as open as Nostr. In the end, Bluesky just seems to be a slightly better version of Mastodon/ActivityPub. That's not what we need.