While I agree with what you are saying in principle, by the same token there is no proof that God or a soul does NOT exist. And to be truthful, there is no amount of logic or science which can prove that they don't exist. While we may learn all there is to know about what happened after the Big Bang, there are still no viable theories about WHY the Big Bang occurred, or what came before. SOMETHING caused it, and it might well have been God. There's no proof one way or the other.