Hussar
Legend
There is a different level of acceptance when one is a very not-literal story (I understand some out there are biblical literalists), and the other is the literal history which your characters are experiencing the aftereffects of.
I‘d be squinting side eye at the player who sat down at a Dragonlance table saying they the player (not character) was repudiating the Cataclysm as not literal history of the setting.
To be fair though, the Flood is hardly the only "God hits the reset button" story in the Old Testament. To me, this is just old Testament style approach to D&D religion. To be fair though, most of my DL experience lies in the modules and in the first handful of novels. Mostly in the modules, where, as was mentioned before, the Cataclysm is linked to the idea that the Kingpriest was trying to magically summon a god to destroy all evil. The notion that the Kingpriest was good, IIRC, comes out in later novelizations, and I generally didn't read them.