I believe the Bible to be the word of God & that He had a hand in those writings. If you've studied at all on how the Bible was compiled, you would see it was definitely something that man did. The compilers never mentioned direct intervention in what books would be included & which wouldn't. In fact, you may recall, they stated that the Heavens were closed to further revelation.
Question for you. Is there anything in the Bible that doesn't have a purpose? Anything that's worthless? If not, why the mention of these books if there wasn't some relevance for us?
The point is, the Lord had a hand in the writings. He was kept out of the compilation. Study up on how the Bible was put together, it's a fascinating read.
I know exactly how the Bible came to be....through God. The history of it is fascinating....but not as fantastical as the Book of Mormon. Obviously you think God did direct Jospeh Smith in the creation of the Book of Mormon, but was unable to direct the Church fathers in the organization of the Bible. And so, ultimately you don’t believe in the Bible do you?