You appear to want to make this into something it isn't. Bluesky isn't beholden to Jack's wishes and has repeatedly and publicly affirmed the same.
I don't care about Jack and neither should you. Bluesky is Bluesky run by the Bluesky team. The team and what they're building should be your only concern.
If Jack is the majority shareholder (I don't know if he is, just using this as an example), they have to do what he says.
Twitter has a CEO now, but the majority shareholder is Musk. She cannot do anything without his permission. Were I CEO I would remove that childish poop emoji auto-responder but I don't think she has that kind of authority. Facebook has a board of directors, but Zuck is the majority shareholder, so they have to do whatever he wants, so they spent time and money on the metaverse when a normal corporation might have said let's not.
You’re right that governance structure matters. However, people speculating about ownership instead of researching it doesn’t help much. Each organization is different and analogies aren’t facts.
Looks like Dorsey had a seat on the board as of 2022. I don’t know if there’s a good way to find out if that changed? The closest thing there is to an official web page is the FAQ and blog articles that it links to.
I don't care about Jack and neither should you. Bluesky is Bluesky run by the Bluesky team. The team and what they're building should be your only concern.