More poor, less school.
Kids leave school to work and help the family, they don't stay much in school. Also they can't buy mining equipament, neither pay the eletricity bill for it.
You can't compare a poor guy with some blockchain genius, they have differents chances. Bitcoin/cryptos will be on poor countries just when someone go there and explain the benefits and how to use.
You have a point here, but you know what there are people who are poor but have talent. There are NGO's who are very supportive of poor people, and even sent them to university abroad.There are also scholarships from government who cater poor students.Since education is one of your reason, when this poor is educated, it is not possible that they can learn cryptocurrency and earn from it? How about he become a developer? or even a freelancer and received payment in cryptocurrency? The possibility are endless for bitcoin to help the poor since we are equal worldwide with bitcoin.