Agreed. He's not a "fall on his sword" kind of guy.The Pillsbury dough boy doesn't want to die an idealogical death any more than you and I do.
When his saber quits rattling, he will too. JMHO.
The Kim dynasty was doomed. His father knew it and held power from a time when the country could be isolated to the onset of mass means of information. He did so by increasing brutal executions masked by accusations of treason and daily warnings of the impending invasion of the US.
Baby Kim came to power when the purging was less effective so he increased it. Total cyber isolation was impossible so he increased the labor/re-education/death camps by 10 fold. His last resort was the all out preparation for war and provocation. All of this is only to prolong the Kim's hold on power.
He's a true coward who will try to flee when the dam breaks. He likes living and I would guess he has billions hidden in Saudi or Irani banks.
I don't think the secret power structure in NK will allow him to launch. I'm sure safeguards are in place from the ones inside that can stop him, and will if it came to it.
Saber rattling only gives away your position. It don't win wars.