I think it's just this particular drama - OpenAI people are of the same tribe as Elon, and surely they prefer Twitter/X, not Mastodon or Bluesky.
Are they all in the same “tribe”? Maybe you should enlarge the definition?
How about us all IT people who watched the drama unfolding on Twitter while our friend are using FB and Insta, we are far from SV and have mixed feelings about Elon Musk while never in a million years wanting to be like him? Also same “tribe”?