If the problem were China, Russia, and the US, there is no problem. Nuclear stockpiles have been drastically reduced because a limited number of superpowers are

If the problem were China, Russia, and the US, there is no problem. Nuclear stockpiles have been drastically reduced because a limited number of superpowers are willing to sign treaties to avoid bad outcomes for everybody. The problem with this technology is that it's cheap enough for DPRK, Iran, Turkey, etc. to use too. Good luck stopping that with a treaty.