Maybe a flat earth description in the bible was intentional. Weren't there supposed surprise inventions of God for future generations. Ecclesiastes 3:11 comes to mind.
"He has made everything beautiful in its time. He has also set eternity in the hearts of men, yet they cannot fathom the work God has done from beginning to end."
To ancient people, the fact of walking upside down on this world would be ludicrous. Mass and Gravity of the elements would have no meaning to those will no grounding in science. At some point in life a person has to become a believer in gravity to accept the fact that the earth is a globe.
A long time ago a co-worker of mind told me a story about a belief his mother had. She said that man could never have walked on the moon due to what the bible said at Genesis 1:16
"God made two great lights: the greater light to rule the day and the lesser light to rule the night. And he made the stars as well."
His mom was under the impression that the moon when lit up was emitting fire like the sun. She reasoned that the astronauts would burn up when they approached the moon. Isn't that funny?