You left two key words out, didn't you?
"Sorry, last I heard, Christian tradition held that Moses, not God, wrote Genesis."
We call that "blasphemy".
And why would Kylie have to add the "not God" stipulation? Isn't the mentioning of Moses not enough to exclude all the other. In your opinion, she would have to write
Sorry, last I heard, Christian tradition held that Moses,
not Joseph Stalin, wrote Genesis.
Sorry, last I heard, Christian tradition held that Moses,
not Greta Thunberg, wrote Genesis.
Sorry, last I heard, Christian tradition held that Moses,
not Franklin Roosevelt, wrote Genesis.
Sorry, last I heard, Christian tradition held that Moses,
not Josephine Baker, wrote Genesis.
Sorry, last I heard, Christian tradition held that Moses,
not Charlemagne, wrote Genesis.Sorry, last I heard, Christian tradition held that Moses,
not Isaac Newton, wrote Genesis.
Sorry, last I heard, Christian tradition held that Moses,
not Stephen Jay Gould, wrote Genesis.
and so on
ad nauseam.