Sorry you seem to disbelieve 2 Cor 5:17, which says ALL THINGS ARE MADE NEW.Actually it’s not.
Man is spirit, soul and physical body.
Our body contains sin that comes from Adam.
Once our spirit is born again, it has a new nature; the nature of God.
Our spirit undergoes the new birth, not our flesh.
Jesus answered, “Most assuredly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God. That which is born of the flesh is flesh, and that which is born of the Spirit is spirit. John 3:5-6
They will be replaced by heavenly bodies fit for eternity.Our bodies are change at the resurrection, at His coming.
The corruption of 1 Cor 15 isn't sin: it is old age and injury.Behold, I tell you a mystery: We shall not all sleep, but we shall all be changed— in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we shall be changed. For this corruptible must put on incorruption, and this mortal must put on immortality.
1 Corinthians 15:1-5
For this corruptible must put on incorruption, and this mortal must put on immortality.
I agree.Do you understand that “this (present tense) corruptible” refers to our physical body, that remains corruptible until the resurrection when it puts on incorruption?
This change from corruption to incorruption, from mortal to immortal takes place at His coming, and the resurrection of the dead in Christ.
No more fingernail clipping or insulin injections.
No more dental exams or glasses.
Our obedience to God will be amply rewarded.
The disobedient will also receive a reward, but it will be a lake of fire.