"The Watchtower's key biblical passage that they use to "prove" their teaching that those who enter heaven must give up their physical bodies, is 1 Corinthians 15:50
Of course, once again they directly ignore the very words of Jesus.
Luke 24:39 (English Standard Version)
39 See my hands and my feet, that it is I myself. Touch me, and see. For a spirit does not have flesh and bones as you see that I have."
Of course, the WT know more than the apostle Paul!
2 Corinthians 12:2-4 (New International Version)
2 I know a man in Christ who fourteen years ago was caught up to the third heaven. Whether it was in the body or out of the body I do not know—God knows. 3 And I know that this man—whether in the body or apart from the body I do not know, but God knows— 4 was caught up to paradise. He heard inexpressible things, things that man is not permitted to tell.
Have a read about what he says regarding the resurrection body 1 Corinthians 15
Blessings,
Stephen