My objection is that historically bluesky itself has been extremely selective about whom it is "open to" Why is everyone talking about this like this site launched yesterday

John Scalzi

I don't really have an objection to the CEO saying Bluesky is open to all; it's kind of his job to do that. But as others have pointed out, the design of the site means it's harder for trolls/bots/chuds *and also* influencers/hypebeasts to get traction. The "bubble" here is actually normal humans.