> God has given us the written word for a reason.
Indeed. The Written Torah contains all the Divine precepts. But practically all of the precepts appear non-understandable. Their practical applications are neither defined nor explained in the text.
You make the argument of the Gnostics. Only they could understand the “hidden” knowledge. God’s Word is given so we can understand it. I encourage all to read His Word and seek His wisdom. He will answer.