It's certainly an outrageous simplification to lump the rest of the planet into one category, but it is perhaps the most manageable way of introducing the treasures of other musics into our very limited orbit. I think it's good to have music coming from all over the world. It's like a child who travels. You know your roots and where you come from, but when you travel you get a lot of experiences. It's like Cuban music.
Blues music is just like that.
I can tell you that when I was a child I was listening to blues, rhythm and blues, funk and jazz. For me, it was the same people from the same place. It's very helpful for people to discover something new - new melodies and fresh things. There are two different things. There is music coming from a market and there is music coming from a human.