Everything in creation is useful to God. Before now, we have situated ourselves in a frame of mind that thinks God only cares for some things within a set time and some set days. But everything is under the care of our God. God cares for everything He has created.
God ordained that His Son Jesus who is the heir of all things, would reign over the entire created realm. Not just Jesus alone, but Jesus and His bride – He and the rest of His brethren who are sons like Him.
The kingdom of God is, God and His sons “incorporated”. They are ONE.