Their problem is a lack of cultural resources (to put it kindly).
I see what you're saying, but that's a bit to simple. At one point, Western Europe was considered to be culturally backwards.
At any rate, most of Africa's problem is Marxism. Second, they lack the know-how. Even if the "know-how" could be shown to them, the only ones who would benefit over there are communist regimes.
Marxism is the foremost problem in African nations. That's not surprising seeing that every country that has practiced it produces poverty, misery, and death.