Breaking that promise would make me feel very bad.
You and your dog have not made that vow. I'm sorry, but you just haven't. Dogs aren't capable of "vows" they are capable of training and pack behavior so you have successfully packed up with your dog, so your dog is naturally going to want to defend you, but in no way has the dog made any kind of "promise." I'm sorry pets are not able to enter into some sort of overt or even covert "promise" that is misunderstanding an animal's behavior.
I guess I'd say that sure, the stranger may mean "nothing to me" but as I've stated most human beings have value to other human beings, and I don't think I could live with myself if I selfishly chose my attachment to a pet over a human being's life. I mean, really sit down and think about that. If you are in the situation, how are you going to feel defending your choice, to the police, to the stranger's loved ones, to whomever shows up next? "I'm sorry, it's just that my dog and I made a promise to each other to look out for each other's welfare, so I ignored the human being in distress."
I take it you are all meat eaters too? Well, so is your pet, and your pet's gonna eat you, and not even feel bad about it, unlike the cast of "Alive."
Never mind, I did some quick online research on the matter and now that I understand it better, I know that most of you are just being driven by your deep emotional and super primitive limbic system, and you can't help yourselves. Is a Dog's Life Worth More Than a Person's?
You know it's odd I can quite often be a highly emotional person, but it's good to know that when it comes to moral and ethical reasoning, I can use my higher order brain functions, because that is actually fairly accurate. When faced with such a situation, I screen out the lizard brain, and try to use my higher order executive functions, so despite all the rationales given to save the pet (most of which are pretty nonsensical) I now know that you're desperately trying to rationalize and justify your lizard brains, and you can't help it.
Carry on. Sweet Jesus, but carry on, I'm done here.
Anna