Bluesky adds 700,000 new users in a week / A ‘majority' of the new users are from the US, indicating that people are searching for a new platform as an alternative to X.
That is actually an advantage. Centralized platforms are able to achieve larger audiences, increasing the chance that I will be able to find content I actually care about.
Pretty much how Bluesky took off at all. It's just the polarization of the platform style reflecting the polarization of society: Twitter/X went right-wing so the (center-)left made their own platform. It's the same thing the right did when Twitter was politically censoring right-wing content before Musk bought it and Trump made Truth Social, the only difference being that Bluesky got the Big Tech and mainstream media blessing. Musk said he would stop that sort of censorship but just reversed it to censor left-wing content. Nobody actually wants a truly free platform, they just want their echo chamber.