I have confidence that options are on the table to deal with this and that at some point in near future, it will be dealt with. Hopefully the solution does not result in the destruction of Seoul - which is a very real possibility.
It would be horrible about Seoul but the great thing about Seoul is that there is the “rest of the country”? Seoul will recover...the question is when would be the best time to “weather” the storm in cleaning out all those artillery pieces and secret tunnels aimed at the capitol. The seat of the government and its bureaucracy should be moved out of Seoul post haste for a start!
Seoul has a population of 20 + million.