Dick recognizes a contradiction in the idea that the greatest good can only be fulfilled through human suffering. How can that be the greatest good when the suffering is unacceptable? He calls it the dramatic tragedy of the universe. It is a paradox: the purpose of reality is a unified harmony which is achieved by unjustified human suffering which makes the entire thing unjustified. The true goal then is to save the individuals.
He returns to his idea of the never-ending dialectic. The answer is a second entity split from the Godhead that works at odds with the part of the Godhead striving for a unified whole. This Christ-like entity wants to free humans from suffering creating a push-pull dynamic with its other half. The goal of unity is only then theoretical because of the self-contradiction.
I believe Dick’s conclusion is that this schism sets up an outcome where the unified endgame can only occur through the salvation of the individuals, which means the Godhead is subordinate to us if it wants to reach the ultimate goal of creation.