In my opinion the bible is written with symbols, metaphors, allegories and other literary devices and one must spend a lifetime studying and reading it.
And millions of people have felt the same, over 2,000 years, and have come up with all sorts of interpretations by the end of their life.
That's not very helpful now is it?
I can't prove but that is what I think.
And many Jews feel the same about the Torah.
And even more Muslims feel the same about the Koran.