The Double Standard of Positivism

Positivism is the position that only strictly empirical truth should be admissible within science. According to science, there's no moral judgment between pain versus not pain or suffering and happiness. But as a scientist, why do you value your life above the lives of poor, hungry children in africa? You're run by fear and survival. Your humanity and your science can't be so cleanly separated as youd like it to be.