Should South Korea Consider A Preemptive Military Strike On North Korea?

Interesting article in the Diplomat which discusses what should be the trigger for the ROK to launch a preemptive strike on North Korea’s nuclear program?:

As North Korea continues to develop both nuclear weapons and the missile technology to carry them, pressure on South Korea to take preemptive military action will gradually rise. At some point, North Korea may have so many missiles and warheads that South Korea considers that capability to be an existential threat to its security. This is the greatest long-term risk to security and stability in Korea, arguably more destabilizing than a North Korean collapse. If North Korea does not arrest its nuclear and missile programs at a reasonably small, defensively-minded deterrent, then Southern elites will increasingly see those weapons as threats to Southern survival, not just tools of defense or gangsterish blackmail.  [The Diplomat]

You can read the whole thing at the link, but the author makes an argument that at some point the ROK cannot allow the North Koreans to manufacture a huge stockpile of nuclear arms. Right now they have it is believed 5-10 nukes which is good enough for regime survival purposes, however what happens if they begin developing over 100 nukes?  This would change the military balance of power on the peninsula towards North Korea because the ROK does not have the missile defenses to survive an attack from that many nuclear weapons not to mention the conventional artillery strikes they would launch.

I think the wild card in this is if the Chinese want that many nuclear weapons right on their doorstep or the threat of a war caused by a preemptive strike to stop their nuclear program.