God is a King and His Word is not just the idle ranting of a man. His words are the commands of a Sovereign LORD. And as Sovereign we are His subjects. Genesis 2:16 & 17 are the first commandments LORD God gave to mankind (Adam). Adam and Eve broke this commandment and plunged mankind into Sin (Sin Nature). Genesis 3:15 is in effect sinful mankind’s out clause. Her Seed, this must have had Satan scratching his head up until a little virgin girl named Mary was impregnated by the Holy Spirit.
Understand man (Adam) give the world to Satan, so it had to be man (Jesus) to get it back. GOD established sinless man to do it because sinless man gave it away. Remember Adam and Eve was sinless; that’s why God could commune with them. That’s why LORD God had to drive Adam and Eve from the Garden of Eden. Sinful man can stand in front of a Thrice Holy God. Only righteous and holy can stand in front of the Throne of God and Jesus is our Righteousness and Holiness, which not only stands in front of God but sits at the Right Hand of God the Father.