China is afraid that huge numbers of N koreans fleeing into
China with a war. Not S koreans, but N Koreans. So it's likely
many would rather leave than die. Of course after the defeat
of the military it's likely some percentage of the people would
try to fight on.
The trouble with people like the NK leader is they judge others
by them selves. He probably doesn't let any one who might a
bullet or knife close to him.
A army parade of perhaps a 100,000 men marches past and
not a bullet for any of them.