It's true that much of the primary education is highly centred around political ideology. There are still many skilled North Koreans who go on to become doctors. There are some in the assembly. Many of them go on to have successful careers. If you look at someone like Sungju and how hard-working he is, there are very few North Koreans who can speak English this fluently and this confidently, and he's done it in very few years. I would never underestimate the determination and the success that North Koreans can achieve with the right chance.
On October 2nd, 2014. See this statement in context.