Question

If we accept the assumptions that the Creator created the laws of physics, the existence of human beings, gave us free choice, gave us morality, and wants us to be moral, and apparently did this so that we may perfect ourselves (something He cannot do without us).
You argue that morality is a tool for creating a properly functioning society, and therefore that is not the reason for which He created us, and there must be something more.
Societies existed for thousands of years with immoral behavior.
Morality creates a society that is pleasant for us to live in, or a properly functioning society by your definition, but that does not mean that this is its purpose.

I return to the washing-machine analogy –
A washing machine receives water and electricity for its purpose – cleaning clothes – it does not expect a revelation from its maker.
Human beings were given free choice and a compass (conscience) for their purpose – to perfect themselves – so why expect revelation?

When a person is in a moral dilemma, whether to steal or not to steal, and he decides to choose the good, there is self-perfection, even without religious commandments (you also argue that God gave us morality and commandments and that we are equally obligated by both).

If perfection can be achieved through morality alone, why add more entities to the theory? (religious commandments)