Not so, if you look at their website, you’ll see at numerous time through the decades they actually decreased the risk of Armageddon. I fear your sentiment of complacency is precisely the danger they’re warning of. To pull a quote:

In an urban society, everything connects. Each person's needs are fed by the skills of many others. Our lives are woven together in a fabric. But the connections that make society strong also make it vulnerable.

Threads

It just takes one thread, whether it be food, water, environment, radiological or biological to snap, and down goes civilisation. As civilization becomes more complex, the threat surface also become exponentially larger.

Basically, each half of the peninsula wanted to absorb the other half under it’s legal, monetary and language and naming systems. Both halves wanted a reunification under their terms. Both halves believe they are the real Korea. To the south, the northern states a rebel states. To the north the southern states are capitalistic pig-dogs in hock to the USA.

New approaches from the south is looking to reconciliation and respecting the north’s self determination.

With that summary of my understanding of this article out the way, maybe a model for their relations is the devolved UK.

While I think a, devolved union is better for the world, it can’t be under a reactionary dictatorship. I fear this red line is too much for each side to come to agreement on.