Let me guess, you're from EU or USA ?
Nationalism is not what's stopping most africans to move abroad. I'm lucky I was born in France so I don't have to bother with visa refusal like all my cousins in Algeria.
e.g in Nigeria most professionals hardly earn $500. Now compare to zimbabwe - the same professional earns 2x-4x the nigerian wage. Yet Nigeria has higher gdp per capita.
so yeah gdp per capita or gdp per capita ppp - might really reflect the african dynamic.
Or to give a rather poor analogy for lack of better one, India has premium-business-class experience migrating to West, compared to other APAC, which are put through economy-saver class experience.
[1] https://www.immigration.interieur.gouv.fr/Europe-et-Internat...