Because our Creator is the ultimate loner, utterly peerless, absolutely Unfathomable. We alone can choose to contemplate It and Its incredible Majesty, and we, as creatures, can only grasp tiny aspects of its Being.
It would prefer that we choose to live humanely, deciding to rise above our animal potential to create happiness for others, so that more of us have the peace and time to contemplate this beautiful creation.
Do we? You seem pretty sure of yourself here
> the Law of Karma (reaping what we sow in others) is the universe's feedback mechanism to nudge us
Why should the universe care about the infinitely small meaningless short-lived speck of sand that I am?