Ehhhh, maybe this is true but I think you’re overselling in the other direction.
North Koreans don’t speak Mandarin, they would be loath to consider themselves as Han, they have a totally unique food culture, etc.
I honestly think it’s closer to US / Taiwan style connection than what you claim.
To go even further on the Han point: https://en.m.wikipedia.org/wiki/Four_Commanderies_of_Han#His...