The Overlord wrote:
Was humanity as certain to die as the Valakans were in this episode? Because this episode presents it as an almost certainty they will. If the Vulcans knew humanity would almost certainly die and did nothing to help, they would be psychopathic.
If you have seen Carbon Creek
you know that this is precisely what the Vulcans would have done hypothetically during the Cold War and have actually done during WWIII. They stood idly by while Earth was about to destroy itself in a nuclear armageddon.