dean said nothing of his own suffering. or sam’s. or even cas’. he said nothing of the suffering of anyone he knew. dean got emotional over the billions of people through thousands of years that had to suffer at the hands of devastating plagues and famines and wars. he cried over the pain of all these people who he never even in a million years would have the opportunity to know. he came to the defense of all of these strangers even when he and his family have known suffering beyond comprehension. he didn’t think about himself. he didn’t ask why for himself. dean had every right to be selfish and make his anger and sorrow about himself, but instead made it about the people he would never know, because he cares so much about humanity and cannot fathom how someone could just let people die knowing that they have the power to stop it.