NK would likely destroy most of Seoul in the first day of the attack. They couldn't win a clear cut victory but SK would be set back several decades. Fatso has to know this.
While that in theory might be true, that begs the question: do the North Koreans even
have enough cannon shells to attempt this for a prolonged bombardment? Like I said, it appears the North Korean military is mostly
all show and no go.
Besides, the majority of South Korea's industrial base is out of range of those guns. I believe the corporate headquarters and main manufacturing facilities for Samsung Electronics are in the central and south parts of South Korea.