To be fair, it is actually logical possible that the universe was only booted into existence with a 13+ billion year backstory some 10 thousand years ago, just as eventually we might construct such a universe simulation running on our own technology at some point in the future (making us the Gods of said universe's inhabitants).
Are you familiar with "Last Thursdayism"?
I was, but you inspired me to look up the origin of why it was Thursday - for some reason I had it my head as a Douglas Adams concept ("I could never get the hang of Thursdays"), but despite his various other parodies of creation myths, surprisingly it seems he never mentioned that one!
I imagine for most people it's a total non-issue. Unless you're a scientist or you breed plants/animals, believing in creationism instead of evolution makes pretty much no difference.
Give them time...by the the they reach their !I'd sixties, almost all of them will find psychological solace in the bible..or whatever afterlife scenario their culture offers...literally no atheists in foxholes