I think the better term is “rationalization” . . . . we clearly have a text that says “NOAH ONLY REMAINED ALIVE, AND THEY THAT WERE WITH HIM IN THE ARK.”
You either have to claim that Genesis skipped over the part where a couple of giants strolled onto the Ark (violating the very premise of the story, that God intended to punish everyone except Noah’s family)…
… or you have to accept the flawed transmission of Old Testament legend.
I do not think many Evangelicals would accept your position (OR MINE) … and that is the problem with such Evangelicals.