>>>No if you tell me that the SK's military command was seriously advising to restart the war then I would tell you that either this is BS or that some generals should have been sacked (and perhaps they were).
With the caveat that I wasn't the one there, so this is second-hand: Yes, that's how it was communicated to me. The Korean 4-stars were advising restarting the war, and the sole American 4-star to have any say in the matter was the only voice of sanity. I dunno how much of that conversation made it to the South Korean President, so I don't know if he fired anyone afterwards. I'm not sure what the formal process is for the ROK-JCS, USFK, CFC, etc... to make a recommendation to the Korean President, as well as the US President, as well as the United Nations Command. All I know is that if left to their own devices in 2010, the ROK JCS would have invaded the North, knowing full-well what the consequences would be.
Things coming down to only one, single, yet influential person saying "that's a bad idea" should highlight that maybe we don't have sufficiently robust institutional controls in place to avoid a bloody conflict indefinitely.
>>>The worst thing that could realistically happen in Korea is a collapse of North Korean regime.
I'll absolutely agree with this though. There is a very poor understanding of the morale and motivations of most of the NK flag officers. We don't know which ones will outright surrender. We don't know which ones will say "Fuck it, attack the Imperialists!" We do have a reasonable understanding of the Kim regime's priorities: regime survival. So the status quo is preferable to the almost-guaranteed chaos that will ensue should the NK commanders suddenly find themselves in a power vacuum, especially if caused by a hostile foreign actor.