I guess it is a consequence of the Reddit migration where the habit is just keeping the old community name. But having C/Politics being US only on Lemmy.world, an instance that aims to be international (hence the name), seems weird to me.
Would have been cool to give up this assumption that everything is related to US by default when moving away from Reddit. I mean, even the canadian political news of Lemmy.ca is CanadaPolitics.
I don’t understand this “them vs us” mentality. People are people. Outside of just yourself, you can never designate whether someone will generate quality content based solely on where they came from or what they did previously. If you want niche, joining an instance that literally designated itself as general purpose was a bad idea in the first place.