Literal belief in the flood story

[Godscreated]

like I said earlier the highest mountains were only 22.5 feet below the water not nearly deep enough to keep out sunlight.

The highest mountains would include Mount Everest

Its peak is 8,848 metres (29,029 ft) above sea level[1

There is a moss that grows at 6,480 metres (21,260 ft) on Mount Everest.[49] It may be the highest altitude plant species.[49]

This moss is 2,368 metres below Mount Everest's peak.

Polylepis

Some species of Polylepis form woodlands growing well above normal tree line within grass and scrub associations at elevations over 5000 m; which makes Polylepis appear to be the highest naturally occurring arborescent angiosperm genus in the world.[2]

Light may be detected as far as 1,000 meters down in the ocean, but there is rarely any significant light beyond 200 meters.

The zone between 200 meters (656 feet) and 1,000 meters (3,280 feet) is usually referred to as the “twilight” zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a miniscule amount of light penetrates beyond a depth of 200 meters that photosynthesis is no longer possible.

The aphotic, or “midnight,” zone exists in depths below 1,000 meters (3,280 feet). Sunlight does not penetrate to these depths and the zone is bathed in darkness.

If the flood waters were 22.5 feet above the top of Mount Everest, even the high altitude moss would be in darkness.

I found an interesting article on a Christian website - The Genesis Flood Why the Bible Says It Must be Local

This explanation doesn't make the story true, of course, and it ignores the evidence that humans originated in Africa, not the Middle East. It still makes a lot more sense than the flood waters covering the entire planet including the top of Mount Everest.

Exactly why did Everest need to be that high at that time.