It’s worth noting that those numbers around nuclear arsenals are apples to oranges. The US and North Korea maintain different classes of arsenals. For the US, the goal is mutually assured destruction for a global power. North Korea is really only worried about regime survival, so their arsenal (along with the artillery targeting South Korea) need only be a regional threat. Neither is particularly intended to be used except to threaten.
It’s worth noting that those numbers around nuclear arsenals are apples to oranges. The US and North Korea maintain different classes of arsenals. For the US, the goal is mutually assured destruction for a global power. North Korea is really only worried about regime survival, so their arsenal (along with the artillery targeting South Korea) need only be a regional threat. Neither is particularly intended to be used except to threaten.