Personally I don't really care that Bluesky is centralized, I actually prefer it since it's easier to use and there isn't the risk that my random server admin is going to go rouge or shut down the server like you get with Mastodon.
Twitter was pretty much fine until Musk started shitting it up so something that is pretty much like Twitter pre Musk is all I want. Bluesky fills that position well.
I see why people might say it but "Bluesky is centralized" isn't an especially accurate criticism. The protocol allows essentially any aspect of Bluesky to be decentralized, up to and including starting a competing service that still interoperates with Bluesky users—no permission required.