That is simply your assertion with no proof.
Spiritualizing Biblical terms is the same as changing the inherent definition of Biblical terms.
I don't miss what GOD has promised irrevocably.
The Jews during Christ's earthly ministry were not wrong about the Davidic Kingdom of Heaven according to prophecy. They were blind concerning Messiah's sufferings before the glory that would follow. They were hardhearted and unrepentant which kept them from receiving their promised Messiah. They were not wrong about the earthly kingdom which GOD had promised and which was stated to be 'at hand' by John the Baptist, the Lord and His disciples.
I give scriptures to what I say.
NOT of human descent:
John 1:13 children born not of natural descent, nor of human decision or a husband's will, but born of God.
Not of this earthy world and earthy land:
Hebrews 11:16 Instead, they were longing for a better country--a heavenly one. Therefore God is not ashamed to be called their God, for he has prepared a city for them.
What don't you get that blood relations only matter until Jesus was born?
God promised Abraham that his seed would be the Savior.
Jesus' blood is the only blood that matters now.