That were made by Western capital. Let's be honest, Subsaharan Africa is a shit hole with nowhere to go on the horizon. Do you think it's luck that South Africa is the most advanced nation there ?
It's not by luck, South Africa is the most advanced state because it was the only settlers colony in Africa (settlers colony aka where the state sends its own people like United States vs. resource exploitation colony like British East India Company).
Since South Africa is institutionally discriminating against its white citizens, this is happening: South African Economy Contracts At Sharpest Rate in 9 years (Since Mortgage Crisis).
There is no realism in the polarized "all equally valuable" world view of this world. There are institutions and cultural norms all states need to function properly, and yes adopting them requires certain level of assimilation into the post-Renaissance European culture. Even the biggest civilizations of history did that when they realized they needed these norms and institutions. Japan is probably the biggest example of this. South Africa reappropriates the lands of white farmers to black South Africans right now but they also fear drought because black people don't know farming through modern methods.
People and culture are valuable. Subsaharan African cultures might not be detrimental to their surroundings like ISIS but it's self-destructive if they wanna live at the same standard as Europeans...
Another example ? The most wealthy black made nation of Africa was Liberia which was again a nation founded by freed African slaves from North America who adopted certain aspects of European culture. Liberia turned into the shit hole it is now (now, it's one of the poorest countries in whole africa with a super HIV rate) when natives challenged the ruling class aka freed African-American slaves.
Again, There is no realism in the polarized "all equally valuable" world view of this world. There is one civilization in the world that all nations (with good enough scholarly culture to adequately interpret the knowledge) adopted the institutions of when they realized their own systems didn't work anymore. Japanese Meiji Period, Ataturk's revolutions in Turkey, Chinese Dismantling the longest lasting statehood of history with Qing Dynasty. They all represent this, that these nations understood the necessity of adopting the post-Renaissance European methods if they wanted to stay independent despite their vast empires that were crumbling.