In what sense is it true that "that hasn't helped"? Are you suggesting that if they'd kept the reactors running things would have been better?
Perhaps what you mean is "hasn't made the impact of a magnitude-9 earthquake and tsunami zero". Honestly, I can't see that that's a reasonable thing to ask for.
It "hasn't helped" in the context of the post I was replying to.
The poster clearly thought that a kill switch would be some kind of magic button that would turn everything off and "make it safe". I'm pointing out that nuclear power stations don't work like that.
Clearly, it is a much better situation now than if they had been going when the tsunami hit.
Perhaps what you mean is "hasn't made the impact of a magnitude-9 earthquake and tsunami zero". Honestly, I can't see that that's a reasonable thing to ask for.