The Nork’s SOLE advantage, and primary threat, is that they can kill a whole lot of people in a very short period of time, with 10,000+ artillery tubes pointed at Seoul.
They don’t need to be high-tech to lob a 20-lb. shell.
Yes, we can take them all out eventually, but how many die in the meantime?
Seems like there would be an advantage in having the capital be in a city hundred miles south.