That's pretty easy to say when you don't have any skin in the game (relatively speaking).  There is a very strong probability that millions (multiple) will die if war breaks out.  And once the regime is overthrown there will be a full on state collapse and 20+ million north koreans, who trust no one outside the countries borders who will have to be cared for.  It will be nothing less than a disaster and it will take decades and trillions of dollars to recover from it.

That said, it is increasingly looking like war is how this will end.