I dont think i want that kind of content. Quite the opposite, this is the reason i chose the fediverse.

That’s your personal preference. What you call spam others may call content. I expect if your favorite personality / organization / news-provider joined Threads and started posting content there that you don’t consider “spam” then it being in Threads would be an annoyance.

I believe kbin doesn’t have it yet, but some fediverse platforms offer the option to block a particular instance from your feed without limiting everyone else. So that would be an alternative. Even if by default it added Threads in the blocklist of everyone.

I expect you do see some value on federation (seeing how you seem to be participating in some communities beyond your home instance), so I think the question “why would anyone sign up if they can just use Threads” would answer itself if you don’t assume everyone shares your preference.

And it’s perfectly fine if those people turned away by the fediverse don’t join. Personally, I don’t think we should be trying to get everyone to join at all costs or anything like that.