I understand your point, but I believe these questions stem from a search for meaning and control.
God created man, not the other way around. God has always existed, and He created us with the ability to understand and connect with Him.
Moral laws reflect universal principles of good and evil, not just societal power. Values like helping others and preserving life have always existed and are inherent in human consciousness, even if not always acted upon.
A child raised without guidance would struggle to distinguish right from wrong, which shows the importance of clear moral guidance. Rules in life are like rules in a game—they give us direction and help us choose good.
We have free will, but we follow the rules because we understand they lead to a fulfilled, happy life, not out of fear.