When the Jewish sages of the exile first compiled the story of the Flood, pulling elements of Babylonian mythology, I can’t help but notice the detail about the God of the text vowing to never flood the earth again.
On the one hand, it’s an easy thing to claim. If it did happen again, everyone would be dead and nobody could claim it a false promise.
But on the other hand, perhaps the intention was to tell a story of death and resurrection: It is a final act. It happens once, and then we enter Eternity. No more death, no more sorrow, no more pain.