I strongly disagree that if I, a European living in Asia, make a new social networking account it should assume that the things I'm interested in are American celebrities. Which is what happened on Threads. That's a dumb design decision that made me bounce out immediately.
A simple, privacy preserving solution: ask me! When I sign up, offer broad categories like art, tech, sports, celebrities etc. don't put everyone into one "probably likes celebrity gossip" box on signup.
But it's even worse than that. I already have an Instagram account! They know there that I like art, tech, webcomics, music. I know that's all shared with Threads even if I'd rather it wasn't. But my feed is still filled with celeb trash.