On the face of it this argument seems to have some merit. I have thought the same thing myself before. However after reading the entire Bible I have to say, this compilation of many books called the Bible is probably the most relevant piece of Ancient Literature to our world today. Even more relevant than much contemporary literature I would even go as far as to say. The most obvious relevancy as some people all ready pointed out is the truths contained within it, such things like why you shouldn't kill or murder or cheat on your spouse, the good of repenting to the LORD, and of course the strong power of forgiveness etc.
Even if you look at some of the shortcomings and flaws of the many mortal biblical characters there is something uniquely human about them and their stories parallel well with today's world beyond all other ancient literature. Examples would be like the many egomaniac kings throughout history and the Bible, inter-family disputes over mixed racial marriages (ie: Miriam scoffing about Zipporah, Moses' wife. (Which God epicly punishes her by making her own skin turn leperously snow white in a direct and poetic punishment to her making fun of Zipporah's dark skin)), and things like family vengeance (like when Simeon and Levi wipe out Hamor and Shechem's tribe for Shechem having sex with their sister Dinah. Also note that Jacob was not happy about his sons taking vengeance since he had just arranged peace and a marriage between Shechem and Dinah, so I am not condoning what Simeon and Levi did since their own dad rebuked them, but you can see how some angry brothers going berserk on the tribe of the guy that messed with their lil sister is a very human story and much things that are similar to it happen even today.)
So not only both the obvious good and moral truths that echo from the Bible down through time but also the troubles and toils that men have faced still reverberates from the Bible down through time itself. Not only are the moral tales and lesson relevant, but then when we examine the prophecies, particularly the very unambiguous and straight-forward prophecies such as Israel being scattered throughout all the world and then regathered back in Zion all of which should be statistically impossible after 2000 years of happening, and yet, they have happened in the last Century, all this makes the Bible even more relevant above all ancient literature for the modern time.