Think about it, this is bigger better deterrent, it puts the onus completely on a rogue state, ensure that they nip even the talk of nuclear war in bud otherwise they will be evaporated before they can even begin.
Compare this to older policy, there Pakistan has breathing space and some revenge. They could kill thousands of Indians and then ask international community to stop it from escalation and after the grave pictures it won't be impossible if we are tightened by World to avoid more bloodshed and we are never able to use it.
Considering that you are the one saying this we should not implement this policy.