Your point is spot on and is all important, but neglected in the argument.
All you are saying is the obvious: The spiritual Israel of God on earth is
physical, not just a spiritually
unseen kingdom of God.
The division in Rev 7 interpretation is made clear by first affirming New Covenant Scriptural truth:
The NT Israel of God is in fact
flesh and blood men, women, Jews, and Greeks. The body of Christ on earth is not just spiritually unseen, but is in fact the physical holy nation of God on earth,
made up of men, women, Jews, and Greeks.
The Spirit's body of Christ on earth, is the one and only nation
with covenant promise of the risen God of Israel.
That Israeli/Jewish nation in the mid-east, called Israel after the flesh, is not the newly covenanted olive tree and blessed Israel of God on earth. It was the old covenanted rebellious olive tree of the God of Israel,
before they finally has Him crucified in the flesh.
Part of that Israeli nation, as well as all nations on earth, to the glory of God by Jesus Christ, now all have spiritually graffed part and physical citizenship in the risen Lamb's NT commonwealth of Israel.
Eph 5:30
For we are members of his body, of his flesh, and of his bones.
Where the redeemed Christian, Jew or Greek, is seen on earth,
there is the covenanted nation of God's Israel in Christ Jesus.
ChristRoseFromTheDead said:
"Paul refers to spiritual Israel as children of promise born according to the spirit
Now we, brethren, as Isaac was, are the children of promise. But as then he that was born according to the flesh persecuted him that was born according to the Spirit, even so it is now. Galatians 4:28-29"
And so we see here, that it's not a natural man's ignorance of the spiritual Israel of God, that is at conflict over the 144,000. Rather, it's just another kind of
spiritual-disconnect doctrine, that rejects the NT Israel of God, as being His
physical covenanted nation on earth.
I.e. The natural born Israeli/Jewish nation in the mid-east,
must still be the ongoing covenant nation of the God of Israel, because the NT holy nation Israel of God in Christ Jesus, is
just spiritual, not physical... And those 12 tribes spoken of by James 1 and Rev 7, are physical, not just spiritual.
Therefore, the spiritually disconnected Christian believers, see no Judaizing in the body of Christ, by having specially sealed Israeli/Jews in the body of Christ, to the exclusion of any Greek, Russian, American, British, Angolan Christian. Why not? Because the body of Christ is
just spiritually on earth, but the natural Israeli/Jews are physically here.
A physical interpretation of Rev 7, mixed with a doctrine of spiritual-disconnect, demands a natural-born people of 12 tribes on earth. Who else could that be?, but 144,000 members
of that physical Israeli nation in the Levantine middle east.
That is why they say, that Spiritual Israel is
that part of natural Israel that is of faith and ruled by the spirit.
Their hyper-spiritual eyes disconnected from the flesh and blood physical Israel of God on earth, cannot
physically perceive that natural Israel
only has part in that 144,000 Spiritual Israel, that is of faith and ruled by the Spirit.