It's funny the SPGB go by something called the Global Firepower Ranking and manage to miss the point Shoigu was probably making....

Which was that the DPRK military forces are an integral part of the Korean population and therefore have a resilience and capacity for resistance far greater than equipment or 'fire-power'.

That was precisely the reason the Vietnamese managed to defeat US imperialism, despite the latter having far greater 'firepower' on paper and 'in reality' than the forces of the National Liberation Front.