We need to care about hurting each other, we need to be active in making things right. Because, to paraphrase Jesus on the Sermon on the Mount: You are worth much more to God than chewing gum.
God has created us to recognize the injustice and emptiness and long for something more. God did not have to make us this way. God could have made us like fish, but he didn't. Why is that?
Actions do speak louder than words: they reflect what we really believe. And most religious believers regularly engage in actions inconsistent with genuine religious belief. So they must not really believe after all.