The "water canopy" that supplied the water for the global deluge of Genesis chapter 6 is mixed up in there as well, at some point.
FFG good points. To wt adherents must then be explained how that much water, more then double the present ocean volume, was suspended above ground (by pressure or in space by orbital velocity like saturn's rings.)
Near earth it would block all sunlight, like the oceans do now in the deep. Saturn's rings are now split by moons, our rings would be pretzels with our massive moon. .
to wt's satisfaction, perhaps the Perseverance rover will discover that Mars ran dry because Everest was flooded.