Even if we just remove the missile sites, and any sort of nuclear ordinance on the first attack, they don't really have nearly as much as they claim capable of hitting Seoul[1], and even then it can only hit the northern 3rd of the city, which is less populated. The city itself has put a lot of work into infrastructure in preparation, enough bunkers and shelters to house 20 million. Yes, it will get hit, people will die, but as long as no nuke comes down, I'd consider than a win, for eliminating such a dangerous tyrant.

Of course, coming to terms with China will be an entirely different matter.

1: https://nautilus.org/napsnet/napsnet-special-reports/mind-th...