You missed my point about Laniakea: If intelligent life exists elsewhere, then there is no reason to believe that the universe exists for us, or was “fine-tuned” for us, or that we’re “God’s special children” in need of being “saved.” All Earth-based, human-centric religious beliefs ought to become null and void the moment we discover life elsewhere, even if that life is “only” a microbe on Mars.
“Sin” is a religious fiction. Sure, the word can be used colloquially just as “divine” is (“That chocolate cake is divine”), but “sin,” as a religious concept, exists only in the minds of theists.