The way I see it, you can still talk to your friends by making a threads account (or an account on an instance that federates with meta). If meta EEE's the whole fediverse, you won't have the ability to talk to unshowered strangers free of big corporations anymore.
If we buy that the reason for meta joining ActivityPub is to EEE it, that means that meta sees the fediverse as a potential future competitor that they want to nip in the bud. I would rather leave that bud un-nipped and give it a chance to one day become an actual thorn in metas side, die out on its own terms or remain a niche community for freedom oriented tech-savvy nerds.