"The worthwhile problems are the ones you can really solve or help solve, the ones you can really contribute something to."
That's the very reason the fashionable atheist debate is futile and does more harm than good. It can't bring about peace. It potentially creates a far greater divide than the ones we have endured so far throughout our history (Catholics/Protestants, Christian/Muslims, Sunni/Shiites, the list is long...), since an explanation for our presence here is beyond our comprehension, a transcendental or symbolic substitute for it will never be stamped out IMHO; it's in our nature, it's what made us humans, since the remote times of the awakening of consciousness and symbolic communication (with the sense of social norms, realization of "self" and concept of continuity) when we started to adopt non-utilitarian customs, rituals such as burying our dead, painting on cave walls, chanting, dancing and making use of gradually more abstract references.
Rational explanation for existence such as the latest well publicised solution suggested by Hawking "Because there is a law such as gravity, the universe can and will create itself from nothing will leave even the staunchest atheists quite dissatisfied they expose further and more arduous problems. Spontaneous creation is the reason there is something rather than nothing, why the universe exists, why we exist". This claim presumes pre-exiting laws of nature and gravity, before even nature was there to obey them. I confess however that the scientific methods to come to that conclusion are beyond my comprehension.
However, in spite of my unfathomable ignorance, I can reasonably suggest that atheists are intelligent enough to realise that it is not the worldview a person adheres to that makes him/her right or righteous, and that the heart has other and better criteria than belief or doubt in the supernatural to discern what's right or wrong in human deeds.