Which scripture gives you the impetus to say so?
Romans 7:5 paul says he's not in the flesh. That's rather problematic for someone saying you are in it til you die.
The confusion comes from the term he coined/borrowed, Sarx which literally means flesh, to describe something that isn't physical or physiological.
Romans 8:9 says if you are indwelled by the Spirit you are NOT IN THE FLESH. The problem here is people insist they are "INDWELLED" while they are still in the flesh, and thus the verse can't be right. They are making claims they don't warrant, in other words. So they are basing interpretation of scripture on how their lives play out. Last time I checked, scripture defines me, not my life defines scripture.
Col 2:11 says that body of sins of the flesh, that Paul identifies in romans 7, is removed by a circumcision done by Christ, not man. I guess someone could argue that Christ isn't capable. But, I find that problematic and difficult to defend.
How about gal 2:20A, it's no longer ME who lives but HE who lives in me.
THE ME is the col 2:11 flesh removed,
the HE is romans 8:9 Spirit when the flesh is removed.
Anyone wanting to tie the term FLESH to the human body, must consider Paul knew skeletons in the Church, and in fact that he was one, rom 7:5 and col 2:11.
There are the most direct vss. Now, in a broader sense, with less deduction than it takes to prove Trinity, I could put another 18-25 pages on here. But that would require people to think more than they want. Not saying that means YOU.