I'm sure North Korea is beautiful with its mountain vistas.

But when it comes to the government, the government is on its third generation hereditary ruler. That is a major outlier for Communist countries and a major outlier for republics in general. That isn't generally a good sign for a government to show that it can change. There might be a balancing of factions that the Supreme Leader has to deal with, but it generally leads to governments that don't change policy significantly except during transfers of power.

And, a lasting peace with South Korea involving the demilitarization of their mutual border would be that kind of change I don't see the current government being able to implement.

This isn't a discussion regarding the morality of the North Korean people or a dissection of Juche philosophy, but an analysis of how the government is set up.