''scientists themselves at least agree that the event HAPPENED.''
No, they do not STILL.
''We just don't have scientific evidence to prove some of the details, like that, again, it covered the whole earth.''
We don't have any at all.
Shocker, I know.
''It definitely is somewhat metaphorical, as with many stories from the Bible/Torah,''
AKA, Babylonian
''but, again, most scientists at least agree that it HAPPENED.''
False.