If this were true - that the Bible is simply embellished lies & fabricated history - it never would have become one of the most respected books, certainly the most popular book, ever written!
Contemporary writers would have trashed it’s veracity, decrying it’s prophecies.
We don’t find that to be the case…
The ancient Library of Alexandria, the Pergamum Library, et. al., if they still existed, would probably uphold much of what is found in Scripture. (Modern Archeology does so all the time.)
With the loss of those libraries, we lost much of our understanding of ancient history.