Fixing that means changing most of the codes of the 3D models loading engine - that's why sometimes when a model is visible from both sides, we tend to make another side that has the opposite normals on the other side.
Besides, that's how it works in most of the 3D engines to save up rendering processes that would otherwise be used on areas that are not usually visible, like the insides of a cube, outside or under a map, the inside of your player model, hair and 3D Item...etc