"no one claims it is the literal word of God"
Like most absolute statements, this is false. It might be that most Christians don't believe the Bible to be the literal word of God, but there is definitely a vocal sub group that do claim it is exactly that. Additionally, despite knowing that the Bible was assembled into its various forms by groups of religious leaders centuries after the constituent parts were supposedly written, many people I have talked to believe that the form we have today is what God intended all along.
While we know a lot about the history of The New Testament, the Old Testament is far more obscured. The last I heard it looked like the author attributed as Moses had written the first few books. Which is troubling when you think of all the Christian mythology that comes out of those books. For instance the Exodus appears to be completely unsupported by archaeological evidence.