The only historical examples we have of nuclear war occurred when the capability was unilateral. MAD actually works. The fear you have of a thermonuclear war is a good thing, and that fear can exist in Putin as well... but only if Ukraine has the weapons to instill such fear.
> Just as I’d prefer that IN or PK or both not having those weapons.
The only reason we haven't seen a Ukraine-like invasion in that region is that they both have nukes. MAD works.