Lemmy.world, an instance that aims to be international (hence the name), seems weird to me.

I never got the impression that this instance specifically aimed to be international. It always felt like the aim was to replace Reddit in whatever way that manifests itself. I never got the impression that every community needed to be equally inclusive of content from all countries.

As for !politics@lemmy.world, I think part of the problem is that changing the rule would result in very little change since

So it may be better to just keep the US users isolate where they are and create a new sub that would just be less dominated by those users.