Humans will never be able to look at things outside the lens of our own lives.
If "The Flood" ever happened, I don't think it was an actual global flood. I think it was a Mediterranean tsunami of some sort, caused either by a volcano or a medium-sized meteor strike. Or possibly a tectonic "lunge" and falling, of the plates surrounding the middle east and africa. There isn't enough water to do it on the earth, unless it all drained to the earth's center and Jules Verne is right about dinosaurs down there. And even then, there probably wouldn't be enough.
That's a good example. Imagine you have a child playing with LEGOs, and it's time for bed. If you tell him to put the toys away, he might try to "fly" the airplane to the toybox. If you put it away, you just pick it up and put it in the box. In the child's mind the LEGOS "can't do that". He's a kid, and he sees things in the context of his toys being real. You as an adult can just bypass that and put them away however you want.
We are that child.
We can't see enough water in the world, so we say it's impossible.
We can't think of a way to fit all those animals on a boat that small, so we say it's impossible. We attempt to explain everything within the context of our own understanding. Except that when dealing with God, none of that applies. If you believe in the God of the Bible, then what does it matter about how it happened?
If He threw a big ol' rock into one of the nearby ponds, or popped an earth-zit (volcano), he could accomplish His needs easier than creating a bunch of extra water, then getting rid of that extra water once He was done.
Another example. Easier? Is simply thinking "meteor hits the earth"
easier than thinking "cover the earth with water". To
us more volume of water = a harder task to deal with. But trying to apply that to God is pointless. That is why all of this debate about "how did God do it" is pointless as well. The God of the Bible simply needs to think something, anything, and it is. Filling an empty cup with water or filling the entire planet with water is exactly the same thing to Him: just a thought that came into being because He wanted it to.
I think where we get caught up is that He didn't explain everything to us. That's where questions like "How can the Bible be real if it doesn't talk about dinosaurs, when we clearly have dinosaur bones right here?" or "Where did all the people come from after Adam and Eve?" Does something have to be in the Bible, His "explanation" to us, for it to be real? Of course not. When a 6 year old asks you why the sky is blue, the answer you give him is probably not going to be about the diffusion of light wavelengths. Does that mean it doesn't exist? No, it just means you're telling the child an answer that gives him something, and leaving out the things that would be beyond him. Why can't God do the same with us?