A country doesn't acquire nukes to use them. They acquire them to freeze specific layers of conflict. Actually using them among peers invites annihilation.
Statistics says even if it’s true, unintended use probability sky rockets risking nuclear winter.
It turns out (and I didn't realize this until I looked back into it just a few years ago) that the 70s/80s concept of nuclear winter is discredited and believed not to be something that would arise from a global thermonuclear holocaust.