People don't age and die because they do wrong things, people age and die because that's the reality of the world we live in. Entropy happens. Creatures are mortal.
Additionally, at least from a Christian perspective, we're all sinful. We all do wrong, sometimes on purpose, sometimes we don't even know we're doing it. Sin isn't just "the big stuff" like murder or theft, it's also simply not loving other people the way we should. Even good deeds done selfishly are sinful. Utilitarianism doesn't happen in Christianity.
The Christian religion teaches that our hope is not in this life, but in the life to come. This life is a cross that we carry, by living out our faith in love toward our neighbors. In this life there is suffering. In this life there is death. In this life there is injustice. What we believe is that because of Christ's victory over death, we can live this life in faith, trusting in Christ, and with hope for that future world where there is no suffering, death, and there is perfect justice. And, because of that faith and hope, we can seek to bring a small glimmer of that future world into this present world. By loving others, by feeding the hungry, by comforting those who mourn, by sharing joy with others, and weeping with those who weep, by forgiving those who hurt us, by blessing those who curse us, by offering ourselves, in love, as living sacrifices out of reverence to Jesus, and out of of loving compassion for our fellow man.
-CryptoLutheran