"I believe... in the resurrection of flesh..."
Apostles' Creed
Why cannot we live as spirits, after we leave this body when it dies? Why is it better to have the old body resurrected (though with new super-properties)?
In the flesh dwells no good thing, and the Spirit and flesh are contrary to each other, so the flesh will have to be put off and no longer be a part of the saints in the afterlife.
All spirits go back to God who gave them regardless of how the person acted on earth, so the spirit is no longer a part of the saints in the afterlife.
The only thing that will remain is the soul the true part of the saints that they possessed on earth.
The Bible says there is a physical body, and a spiritual body.
The saints will not have a resurrected physical body, but a spiritual body with new super-properties.
What will resurrect is the saints souls, not the physical body with new properties.
And the physical body cannot be made over, redone, or refurbished, or rebuilt, and this is the reason why.
All sin must be purged with fire, anything tainted with sin, which the saints receive the Holy Spirit and with fire to purge their sins according to the soul.
The Bible says that God is making a new heaven, and a new earth, and the former shall not be remembered, nor come to mind, when the saints are at the New Jerusalem.
The old heaven shall melt with fervent heat, and the old earth shall be burned up and the works of it, and all will be dissolved, for the heaven has been tainted with sin by Lucifer's rebellion, and the earth has been tainted with sin by the rebellion of Adam and Eve.
So there is no redoing this present earth and heaven but they will be dissolved, and pass away, and when the saints and angels are at the New Jerusalem they will remember nothing prior to that, but will always feel like they have been there and nowhere else.
They will not remember the old heaven and earth for they are associated with sin and rebellion.
Which is a place wherein dwells righteousness, where sin has never been, and sin will never be, and sin and rebellion will never come up again.
So the physical body cannot resurrect, and can not be redone to have new properties, like the old heaven and earth cannot be redone to have new properties, for in the flesh dwells no good thing, and it is tainted with sin that cannot be removed, for if it could be removed then the saints would not be tempted to sin, and could not sin, after they are saved on earth.
But the saints are tempted to sin, and have the possibility to sin if they choose to sin, so the flesh is in the same position as the old heaven and earth that cannot be redone once they are tainted by sin.
The glorified body will be a body that has not been redone, and has not ever experienced temptation, and cannot sin, for if it were the flesh resurrected it would have been tainted with sin even though one might say but it is redone.
But there is no redoing of the flesh for it is off the saints, and off it will stay, and be dissolved along with the earth, and heaven, that are tainted with sin.
The glorified body is an entirely different body than the flesh, and separate from the physical body, and not a rebuilt physical body.