Do you have spruces to back up these claims?
Unless this was a tree joke I missed.
OP's point is totally off topic to the article, the actual article title is - "How Africa will become the center of the world’s urban future"
Africa's cities are big already and they will keep climbing. There's no reason to doubt this, they can support large cities, that's easy, it just won't be pretty.
No one is claiming they will be any sort of "Super power". Technology would have to change things in a big way for that to be true. Everyone getting drones in Africa isn't going to help with stability any time soon. OP is strawmanning it.