We already have countless countries having nuclear weapons. So no one should be encouraged to grow their arm power further—even for the sake of defense. (There are far more and better political and diplomatic ways to avert any threat on the country). However, the idea of “complete disarmament” is quite impractical and will never happen; so no point putting our energy and time in contending for it.
So instead, we all should focus more on policy-making that efficiently and effectively guard nuclear-armed countries. Policies that bring each one of them on the common ground with the same visions, compromises, and goals should be framed!