That's where people like us go wrong--trying to apply the logic which supposedly God gave us to stories which supposedly God gave us.
Wait, you mean God wants us to think and reason?
Wow!
I guess that makes sense, because we built an entire civilization didn't we?
But the Ark supporters want us not to think, not to reason, not to question a fable, so I guess they shouldn't be on the evil devil influenced internet, or living in a home, or having clothes on their back (except for the naughty bits). How dare we think! We all must stop thinking and move into a cave and not use brains!
Brains bad!