Doing nothing to educate your citizens and then leaving them to go about their business, or educating them and then actively stopping them from putting it to effective use? High literacy is a pro, but it should throw an even starker spotlight on Cuba's cons.
I don't get how Castro supporters can laud Cuban education and in the same breath lament the fact Cuban nuclear physicists can barely feed themselves without wondering exactly why this state should persist. Of course the reason why they're eating one meal a day is because Russia stopped giving Cuba $800 dollars per person per year, it has nothing to do with Castro.
Some countries have figured out how to feed themselves without massive freebies.