there is a religion of the book, where the printed word is everything. It is called Islam. And even it has hadith. 

no normative text may function without an authority, not just to decide what is cannon, but also how to interpret it. 
that is not a limitation of God, it is a limitation of human language. 
no law works without judges - no law can be universal, cover all cases beyond reasonable doubt, without an authority to read it under some tradition, considering some sources and precedents, etc.. 

we can not make a self-referential universal law for a golf club, without leaving space for "disputes and doubtfull cases will be settled by <some internal authority>, or the civil courts of <some place>..."
I even doubt God could do it in a reasonable size using human language. 

The Bible is not just a historical text... from it comes normative stuff. A text, even written by God, can not tell by itself what we ought to do without an authority to interpret and confirm it.

Who decided we should move the sabath to sunday? Or forget the Jewish Temple? These are on the Bible, and we do not follow them. 
 

 You're arguing against a position that no one has.