It's only a matter of time before their missiles do get good enough. They know it, we know it, everyone knows it. And its not going to do much good to wait until that day comes.
>As for South Korea, they have always been close enough to suffer catastrophic damages by traditional non-nuclear action, so why are they willing to come to the table now?
Just because that's been a risk they've lived with for 65 years doesn't mean they're happy or willing to suffer it. There's been multiple efforts over decades to try and resolve the relationship with the North and South, this isn't the first time or first attempt or anything. It's been a big issue in Korea for a long time.
>Unless they are preemptively trying to avoid retaliation on their own soil because of a US - led strike on North Korea.
Ideally. War is bad. It's bad for people. It's bad for economies. And look at it this way. If there was a problem in the U.S., does the U.S. want to solve their own problems or would they prefer China to step in and take care of it for them? Most countries want to solve their own problems and manage their own affairs if they can. National pride and such.
Yeah, if fighting broke out between North and South Korea, they'll take our help because winning is what matters. But if they can negotiate their own peace and own reconciliation that leave the U.S. on the bench, they'll be perfectly happy to do that.