Or, maybe it is a statement helping us understand our expanding universe, and the majesty of our Creator?
Maybe it's just a phrase we are trying to read our preconceived notions into (dimwitted vs intelligent early humans).
And here is where you're wrong. Ignorance of the workings of the universe does not in any way equal "dim witted".
It took a series of brilliant scientists to figure out that the earth was not the center of the universe. Chinese culture held the earth to be flat and rectangular until Europeans arrived. That doesn't say anything about intelligence, it's simply they weren't interested in the question. Science isn't about staring and a problem and solving it instantly with your intellect. Science is about careful testing and the slow accumulation of data. Even if someone has a brilliant idea, they have to test it. The idea of the spherical earth only became popular because the greeks were interested in geometry and thought spheres were the perfect shape. It took three centuries for someone to actually test the idea that the earth was a sphere.
As far as spiritual matters, it makes no difference what the shape and motion of the earth is. It only makes a difference when people are able to travel very long distances or fly airplanes and have most of the other trappings of modern technology. Otherwise the question is purely academic.
You're actually putting science on a pedestal. Your desperate need for the Bible to be scientifically accurate is clear evidence of this.