Step 1: God should exist.
Step 2: Humans need to be psychologically motivated about God.
Step 3: Humans, when they're motivated, are motivated over an infinite time.
Step 4: What would motivate humans is if they could become God, even over an infinite time, but no longer than infinity.
Step 5: The way humans become God is if they are demi-gods.
Step 6: If humans are becoming God over an infinite or less than infinite time, then some of them are in this process existing as demi-gods.
Relativism: same result, only blaming the demi-gods for not being God.