I did grow up animist, but the parents still wanted us educated. And an educated person must read the Bible in order to understand many allegories written about in literature.
And the KJV was the one used for that purpose. We usually read it through by age 14 so that you could know the stories. As a smart alec youth, I used the Onanism story to my teachers' dismay. "Hey, it's in literature, so it's acceptable."
Of course, in our liberal area, we also read "The Godfather" in school.