Therefore, as we don't know how the universe or life came to be, the most probable answer is "it just did".
Would I be churlish to suggest this is absolute reductionism? We've to accept evolution is the ultimate answer until we reach the end of evolution (in reality, the start of evolution), then we're presented with even bigger questions as to how life itself began but we've then to accept "it just did" as the answer? Have we to accept that as the answer because science has no other?
Of course, going back to the OP, if we take Gould at his word, science can't be used to prove or disprove God. Therefore I'd suggest that atheism is a faith and a blind one.