Yeah, I think this part of the issue. If some music is categorised as ‘world’ music, what category does the other music fit into? I do admit I would be interested in something called ‘non-world’ music though. It’s sort of a Euro/US centric way of casually lumping “everything that’s not us” into one category’
It’s a little bit like how North America calls its baseball competition ‘the world series’, but in reverse?
Edit: anyway, this is an example that both satisfifes the OP question, and exemplifies the issues.