...wut?
I don't even know what your approach is, apart from disagreeing with people.
But yes, in a multipolar world where every pole feels like they have a chance to make the world unipolar with them on top, the end result is conflict. This is what happened between 1945-1991, where there was a multipolar world and a whole lot of proxy war.
I am not advocating using the military to stop NK. I am advocating having enough military in place that NK doesn't think they might have a chance with a second invasion of the South. Essentially a unipolar Korean peninsula. Because if NK thinks they can win a war against SK, they will go to war. That's why they maintain a massive military presence and routinely send raiding parties across the border. By "accident".