Well I think instead of trying a psychological analysis why other people dont have the same opinion as you, there is probably an easier explanation why most assume that the Bible talked about a flat earth.

First, the idea of a spherical earth came up in Greece about 300 BC. Until then, the earth was described as flat in all written records that are known so far.

Second, Genesis 1: "And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament."

There are many similar passages in the Bible. "Under" and "above" in space only makes sense when you assume a flat earth, and a fixed gravity direction. A spherical earth obviously doesn't have an "under" direction - it's the same from all sides.