Alex Gladstein has written about this at length.
He works for the Human Rights Foundation and advocates Bitcoin for its humanitarian use cases. He has spoken to many people in these types of countries to get their take on it. See for yourself...
I live in one of those countries. Nobody will accept my currency in exchange for bitcoin. I can't send money offshore to buy bitcoin.
I mean, just ask the Chinese how easy it is to get bitcoin today. The billionaires, millionaires, and political elite can get their hands on bitcoin sure no matter where in the world they are, but not the common man (the actual oppressed in those regimes).
Unlike Alex, I don't have a conflict of interest.
LOL, who in those countries would sell them bitcoin?
You've pulled out an argument I see all the time about the utility of bitcoin, but you can always just tell that it's made by someone who's never lived under an oppressive regime.
It's a first-worlders idea of what thirdworlders can do.