DPRK Recognizes that "Reunification" is Impossible

But "recapture" would be as destructive and would result in overthrow of North Korean ruling regime.

Satellite photos appear to confirm that North Korea destroyed the Arch of Reunification after Kim Jong-un disavowed his regime’s desire for “reunification”. He maintained that the DPRK would attempt to “recapture” and “incorporate” the Republic of Korea into its territory in the event of war. In practice, that is what “reunification” has always meant.