nope. I got attacked by a dog one time in my yard and "my" dog laid into the other dog so quick I barely saw him coming up. The other dog ran away but I have no doubt that "my" dog, bill, would have killed him if he hadn't. Reverse the situation. If some other human was attacking my dog, what should I do?

At any rate, your argument is for why we should behave as if human life is more important, not for why it actually is.