Why would a position on athiesm have any negative bearing on whether the universe is teaming with life? Atheism would likely posit that finding life all over the place hints that it's a common natural process.
People could also see it as evidence for a creator, e.g. that the universe is obviously fine tuned for life. Theism isn't scientifically testable or falsifiable, so science can't say much of anything about it.
Moving the goalpost doesn't prove much. Going from how special we are vis a vis Adam and Eve, to accepting life is actually everywhere and has been since well before Earth was a thing is itself a huge leap to make.
Is it really different than any other retcon that's occurred in the last 500 years? At least in Christianity anything can be de-emphasized or treated as metaphor if it is inconvenient.
