True ... if God already has everything all planned out, what's the point of trying, or pretending to make any choices? After all, it's already planned out. Q.E.D.
The omniscient, omnipotent God theology is also what makes praying pointless. Literally everything is already worked out in advance because God's plan. What makes you think God's going to change His whole plan just because you prayed to bowl a turkey in the tenth frame?