Great logic there, sherlock.
If what you're saying made any sense, then a movie based on the Gospels---namely, Gibson's Passion of the Christ---would've made the studios kill one another for a chance to 'cash in on it'. Instead, they ran from it like shrieking little girls.
Also, the Bible has far outsold the da binky code by a wide margin. And furthermore, not only did the American public make the Bible such a HOT HOT HOT hit, the global public made it a HOT HOT HOT global hit.
Hey Watson (to my Sherlock), when there's money in making the Bible into a movie they'll do it.