This is something that appears to be poorly understood in the tech/computer industry. Superb software design skills aren't as important in areas with serious social and infrastructure problems.

Also, to some extent, I think that those that have recently spoken out against foreign aid in Africa are correct: only Africa can improve Africa's well-being. (I say this even as a former member of a local community organization that raised funds to send an experienced hydrologist to Uganda for a year to work on water quality there.)