Are primitive cultures, like the Sawi, necessary in our present world?

I probably would have never knew they even existed if I had not read this book. But, I still think that primitive cultures are necessary in our world. They have their own way of life and the modern society can learn a lot from them as well as them learning a lot from us. There are things that the modern world would not accept such as cannibalism but not all primitive tribes value treachery and cannibalism like the Sawi. Primitive tribes show us that not everything revolves around technology. Almost everything we do these days involves technology. Primitive tribes don't use any of it and are still getting along fine, although they could benefit from medicines and more advanced tools. I think the modern world and primitive cultures could benefit from the other by learning more about the positive effects of each one and applying it to their own society.