The entire point of MAD is ensuring that no one ever kicks off a nuclear war. But I guess in internet logic, stopping a war from happening is "warmongering."
MAD doesn't have a point, MAD is a fact observed, not an actively sought state (it is, in fact, the result of opponents with sufficiently similar capacity each seeking unilateral overmatch capacity, and neither being willing to sacrifice its own total destruction capability while the other retains it.)