Well, the universe doesn’t need me to keep on going, and it makes me happy while I’m alive that I can help my fellow humans out. That doesn’t really work out i

Well, the universe doesn’t need me to keep on going, and it makes me happy while I’m alive that I can help my fellow humans out. That doesn’t really work out in a logical sense if you assume that people are purely self interested, but they aren’t, their behavior is optimized by evolution and self interest is only one of many complicated feelings that people have. I still share your optimism though that we might cure the diseases of aging, so that people do not suffer from slow decline.