will be able to follow my friends, celebrities, artists and interact with them when federation is activated
Yea and then they'll either defederate, or purposefuly break some interoperability functions. But since "everyone" will be on Threads anyway, you'll just move there too.
It's happened before even with Meta itself. Their messenger was xmpp compatible. Oculus didn't need a fucking Facebook account.
You can say that everything will just get back to how it's now, but it won't. Right now, Fediverse has momentum. Twitter and Reddit are imploding. People have reason to pay attention, and potentially move or expand their online presence here.
Once Threads has a billion users and they cut the rest off, who will care about some tiny competitor? How many Instagram alternatives are you aware of?
Imo, we should welcome users from threads and see how it goes.
People are welcome. Meta isn't.
I don't know why it's so controversial to keep cancer away in the first place, and not wait until it spreads and kill you.