This is trivially debunked. People regularly sacrifice themselves because they think it is right. You could say soldiers fight to protect their kin, but people

This is trivially debunked. People regularly sacrifice themselves because they think it is right. You could say soldiers fight to protect their kin, but people sacrifice even out of devotion to ideas like truth and honor. There are people who refuse to kill animals, even ones as distantly related to us as octopuses, because they think it's wrong. There are people who vow celibacy out of religious obligation, like the Shakers who abstained themselves out of existence. These things cannot be easily explained in your framework. It can't be disputed that morality is partly instinctive. There are those who argue persuasively that morality is largely self-deception, with our alleged values being just a way of rationalizing our instincts. I think you have something of a point. Still, your simplistic version is just plain wrong.