Interceptor missile has no military value, other than to take out another missile. It has limited range, relatively small warhead. It provides no other military purpose. It is a precision peashooter.==
It is shield right? As they said one with sword and shield is better armed then one with only sword.
My neighbor's are well armed, and I have no fear of my neighbor, one because I trust my neighbor and two I am .==
Now you say it "equally if not superiorly armed". So Russia just need now to be at least "equally armed". So Putin was right when he pressed development of new warheads capable to surcumvent interceptors.
Cold War mentality. Russia has a lot more serious immediate threats than the U.S. Besides Russia has twice the nuclear weapons of the U.S.