The difference being that for the Christian (a presumption when you see someone quote scripture) the Bible supposedly defines their worldview, as opposed to various pieces of literature.
Usually the Bible is taught via stories, especially the Gospel stories, rather than individual verses and the verses are quoted to make points.
While there are, e.g., yearly Bible plans to read everything, not many people these days have the patience to read all the numbers in Numbers and there's an incredibly limited theological value in knowing how many there were of the tribe of Napthali or what have you unless you're trying to pass a Bible quiz.
I mean, why would a modern day Christian want to memorize all the rules on kosher food when Paul explained at length why they're irrelevant to us now? Or the rules on making a potion out of the dust of the Temple floor of a temple that's no longer standing? Or the rules about wearing clothing with multiple materials?
Yes, there are yet some principles that might be extracted of some of these--take for example, not muzzling the ox while it's treading the grain as an exhortation to take care of your animals and anyone who serves you. Or the prohibition on harvesting the last bits of crop at the edges of your fields, which were then reserved for the poor, to always reserve something for the poor among you.
But these things tend to be explained elsewhere and it ends up as trivia that doesn't matter much unless someone is insistent that a Real Christian [TM] must know whether the witch of Endor is from Samuel, Sirach or Star Wars... which in turn depends on whether she's named Charal or not.
