The problem with whole thing is, there’s nothing but morphology to go on, and the existence of fossils in a few places in Africa doesn’t mean there are no fossils elsewhere, nor does it mean that there was no one living anywhere else who just died and failed to leave fossils. :’)
Listen, Bub, it’s all roads lead out of Africa or you lose your funding and we strip you of all your degrees. Got it!?
What happens if we find bones else where, which seems to be happening, and they don't relate to the bones found in the Afar region?
Then we find bones that belong to hominids that we had no clue that existed.
Years ago I read a book, “ The Washing Of The Spears”, about the Zulu, Bantu, in South Africa. It seemed that they arrived at the Orange about the same time as the Dutch.
The author stated that they had centuries to occupy a Continent but were to slow.
This peaked my interest and I did a lot of reading. The Pygmies where in Niger during Pharonic times, Herodotus, “The Histories”.
Another thing that caught my attention is that the Bushmen, the Hottentots, and the Adman Islanders, for example, seemed to have been pushed South West and West by pressure from the North East, I have no theory but it seems strange.