My first thought, too. Just a wee bit lat ego develop such a weapon, huh?
Furthermore, SK will loft a 2 ton warhead to the north while NK is shooting 50,000 warheads south. I’m no weapons expert, but I do recall 50,000 is a heap bigger than 2.
The Norks have thermonuclear weapons now. There is no conventional weapon that comes anywhere close to matching that destructive power. check out
Nuke Map to get an idea of what megaton weapons do. the only way to win is to strike first and strike so hard that they can't possibly deploy their own devices.