It's ignorant to believe that the Bible is the "direct word of God" especially when most of the books of the bible say no such thing. The verses that say "all is inspired by God" are separate books which were never meant to be put together or canonized. People often read the Bible as if it were one single book. However the truth is, it's dozens of books written by separate people over a period of 1,000 years most of whom never knew each other. This is one of the main reasons we find contradictions between the various books of the Bible. They were never meant to be put into one single book and read as if written by a single author.
Moreover, There are numerous other books with just as much validity which aren't contained in the Bible due to the early church declaring them heretical.