Perhaps the reason why God would want human courts is that society needs judges to make proper judgement and to evaluate the nation-state, kingdom, country, and etc. Without a good judge in a country evil would likely cause harm and good would be minimal. Intelligence is also what separates man from animal. God gave us the capability to be intelligent while, other animals lack such skill. God wants us to develop intelligence and guide others.
Think about in this these terms why would God allow humans to exist if we're going to just cause evil and good in this world. The Judge is merely an intelligent person who is capable of helping people and understanding what proper course of action should be taken in order for an individual who has caused evil to reform or change.
God is often seen as the final judge because he is King of the Universe meaning he is the most intelligent being in existance. And if God was to hand out judgements to everyone in this life then, we wouldn't have the potential of human achievement of people going out on their own and following the ways of God if he we were to blindly obey God's every command.
the reason being why intelligence is so valued is that without intelligence how does one become like Moses and serve God? Can someone without an education really be serving God? There are no doubt some people who are very intelligent well mannered and are poor and serving God while, there are wealth people who don't serve God as they lack the intelligence to do proper actions via the Knowledge of the Torah. And Vice versa there are poor people who lack intelligence and rich people who have intelligence.
Also, there can't be any form of society without intelligence. Our Laws are written with words that must be read. Our actions are followed by our thoughts which must be made proper with knowledge. Any society, country, nation-state, kingdom that is formed without intelligent people will be without morals, God, and goodness. So intelligence is a necessary quality that any individual needs to serve God including Moses.