It seems to me that black people prefer a finished product than starting from scratch. At least when it comes to nations.
I think that black people don't want to invest in Africa for the exact same reason we don't go to India. Even African diaspora hesitate to build in other black nations. And apart from building a home for themselves , they rarely build business empires in their own homelands also. Until the recent passport breh craze, we had a similar dynamic with latin america too. But You'd gladly see loads of black people investing in china or EU or Japan or us/Canada instead.
Arabs, Indians, and Chinese have a different mindset, where they will gladly go to the least developed places and set up shop. This kind of mindset is an anathema to black people. Even in the US, in our absolute worst and bombed out neighborhoods; black people are running out like our lives depend on it, while Arabs/Indians/Chinese are running the bussiness(es) in those areas.