The problem with your argument is that ignores god. God is all knowing and powerful, there was never any ''need'' of any of those laws, god could have made moral laws from the beginning and there would have been no ''primitive'' civilizations at all since they all of them would have followed God's rules, was it really that hard?
Yes he could have but then we would be slaves.
Why Does God Allow Evil?Awful argument. First it talks about babies dying from horrible diseases and then proceeds to say there is evil in all of us and that's why god can't get rid of evil because he would have to wipe humanity. However, a baby is not evil and has done nothing, he/she didn't even have time to do anything and yet they still die for absolutely no reason of horrible diseases, suffering.
Another important flaw in your argument that we would be ''slaves'' is the FACT that god himself already wiped the whole humanity once, remember? With the flood? I'm not sure your brain functions correctly mate.