Everything black African countries do as regards "development" is basically wrong. It is amusingly tragic to watch. First of all, to fund their "development", they allow predator foreign countries to manhandle them for and fleece them of their natural resources. And then, spurred by a peculiar pervasive mental illness, the political elites steal a substantial amount of the money earned, to be used to purchase garish material things from and in the same predator foreign countries.
With no concrete long-term plans for the future or productive use of any funds, they leap into a cursed silliness by taking unnecessary loans and signing bad agreements like silly little children. To combat existing natural problems, they try to build expensive infrastructure like the ones in more developed countries (who can actually afford them), without much consideration of their own existing constraints and what makes sense within that context. With the hiring of foreign companies no less. Which has made sure that in 60 years after independence, no one in their own country has ever learned to do anything. Everything, however simple, has to rely on foreign technical expertise. It is a loop you see with everything everywhere. No one has x technical expertise —> hire foreign companies —> which means no one gets to develop technical expertise —> justifies the need to hire foreign companies.
Tertiary education is low-quality but also has nothing to do with the acquisition of skills relevant to the context of the poor local economy, but wholesale copying of brochures and syllabuses from much more developed countries. And therefore, you end up with tons and tons of tertiary school graduates whose lousy education is completely useless, rendering them either broadly underemployed or totally jobless. Meanwhile, there are no properly trained people in basic technical jobs like Plumbing, Electrical work, or any type of construction work, but lots and lots of low-quality graduates in different kinds of low-velocity pure, applied, and social science research fields in very poor countries with room for maybe 20 new graduates annually.
With actually practical and relevant fields of studies like the Health Sciences, Agriculture, and the relevant Engineering disciplines (mechanical, electrical etc), because of all the familiar cultural issues, students are severely under-trained, young graduate professionals are maltreated, and everyone involved in these fields is underpaid and under-provisioned (equipment and facilities) so that absolutely nothing works.