They cleared landmines during the Moon administration, so what happened during the leader's term?

The North Korean regime even cleared their own landmines.
What on earth has the leader been doing for the past 3 years that we've just been watching them lay mines on our side without even conducting preemptive strikes?
Did they not care about the nation or the people, and was "anti-communism" just a lie to support the 5 billion club?