Why did God create humans if He already had angels?
God created humans because although He already had angels sufficient to populate the universe, angels did not possess the capability of returning His extended love. Humans were made with the capacity to love God in return, which relates to His plan for the home and marriage relationship.
Les explains that God had angels and enough to populate all of the universe, but He did not have someone who had the capability of returning His extended love. Therefore, God created humans with that capacity. Les connects this to Ephesians and the marriage relationship, and then to Matthew 22, where Jesus says the first and great commandment is to love the Lord thy God with all thy heart, soul, and mind, and the second is to love thy neighbor as thyself. The home is part and parcel of God's whole plan for the ages.