Nothing obliges the universe to be efficient.
As soon as we move away from the single God/always existed model we end up with a group and chaos. The universe is an orderly universe. Faith is needed. Faith in an Indivisible, All Knowing and Eternal God. Do you honestly believe that you can fully understand the Mind of God? why He created the universe. Why He allows innocent children to die, in at times terrible circumstances. The alternative is (and there is no getting around this) that everything just magically appeared out of nothing all by itself. Hmmm, does that really make any sense to you at all?