Advances in offensive capabilities are spurred by advanced in defensive capabilities, and vice versa (going back to the time when the 'offensive' weapons were r

Advances in offensive capabilities are spurred by advanced in defensive capabilities, and vice versa (going back to the time when the 'offensive' weapons were rocks and sticks, and the 'defensive' options were woven plant material). The response to this sort of system is not "Oh, well, guess we can pack up the nukes now", it's "We need to invest in a nuclear delivery system that is capable of defeating this system", and the cycle starts all over again.