South Korea was never going to attack North Korea because, as I mentioned, they had plenty of conventional weapons they could easily deliver to South Korea. They had mutually assured destruction before they even tried to get nukes, that's why they succeeded. Iran does not have that yet, and must be stopped before they do.
I do now know whether this was the right way to do it by any means, and I think it's a shame that the Obama-era deal was abandoned. I think we could possibly have gotten here through peaceful measures. But we did need to get to here.