Not a single one of those references has anything to do with the earth being flat. That God has fixed the earth “firm and unmoveable” in its courses is pretty consistent with modern science. Our revolutions around the sun have been the same for thousands of years. And whether scripture is to be taken literal or allegorically depends entirely on genre and context. I’m always amused by people who have never even read the bible presuming to criticise it.
You didn't actually read the whole essay, did you? It discusses at length the original Judeo-Christian flat earth belief. People aware of the history of science know, for example, that Galileo was found guilty of heresy for describing a heliocentric solar system.
According to Isaiah 40:22, New International Version, not only is the earth a circle (which is a flat object), the heavens are solid, like cloth:
He sits enthroned above the circle of the earth, and its people are like grasshoppers.
He stretches out the heavens like a canopy, and spreads them out like a tent to live in.
And according to Job 38:13, New International Version, the earth has edges:
that it might take the earth by the edges and shake the wicked out of it?
The Bible simply does not describe the universe as we know it to be. Denying that the Bible describes a flat earth, etc., in order to try to make its description of a sudden creation event 6,000 years ago seem more believable is rather dishonest, in my opinion.
BTW, it's very presumptious to assume that scientists don't read the Bible.