Isn't this doing the same thing? That's why I was surprised they went this route with the world thinking they are a third world nation.
Well, we don't know the context yet. Maybe the idea is to satirize Western prejudices toward Africa, our tendency to assume the whole continent is just savannas and slums and tribal villages when it actually has lots of modern cities and richly diverse societies. Showing the contrast between the West's condescending assumptions about Wakanda and the super-advanced reality could be a good metaphor for that.