Wow, I’ve never heard of that interpretation on baptism before. The biggest flaw I see in your assertion is probably the most obvious... your still living in a body of flesh and you will still die a physical death because of sin
I, like Paul in Gal 2:20, see "our" skin and bones like this..."I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me."
It isn't "my" body anymore.
And, I already died to sin when I was immersed into Christ's death, burial, and resurrection...like Rom 6:3-6, 11, 18 state clearly.
The result is Rom 6:7..."For he that is dead is freed from sin."
Paul spoke on Baptism in chapter 6 of Romans, and his writing style in Romans can be viewed as a spiral where he builds levels of knowledge and reflects back upon them. I would like to pull a verse from chapter 8.
Romans 8:10 NIV
But if Christ is in you, then even though your body is subject to death because of sin, the Spirit gives life because of righteousness.
Let's use the KJV for purity of thought.
It is written..."And if Christ be in you, the body is dead because of sin; but the Spirit is life because of righteousness."
That death occurred in Rom 6:6..."Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin."
Your version makes it seem like the body is still alive.
The KJV says it is dead already.
In fact the next verse shows how it is reanimated after its death with Christ, (Rom 6:6)..."But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you." (Rom 8:11)
In Chapter 6 we know that we have died, and rose new. But not in our flesh for Paul states clearly that our body will die because it is subject to sin. Our Spirit, however has been born again (through Baptism) because as Paul states in Chapter 6, we have been United with Christ. We are His bride, and Baptism is meant as our union.
See how your version of the bible has corrupted your thesis?
You follow a doctrine saying sin has dominion over the vessel of the Holy Spirit.
Can you see how ungodly a doctrine that is?
It is dangerous to string together random verses out of context as you’ve done. Our bodies still struggle against sinfulness, which is why Paul also writes:
2 Corinthians 10:5 NIV
We demolish arguments and every pretension that sets itself up against the knowledge of God, and we take captive every thought to make it obedient to Christ.
Doesn't that verse annul your point?
Paul, writing to Christians tells them that every thought must be taken captive and made obedient to Christ. This applies to each and everyone of us. Why? Because our flesh can entice us into sin.
I wish you could be as thankful to God as I am for the death of the old man and the resurrection, with Christ, of a new creature born of God's seed.
Paul writes this in 1 Cor 15:34..."Awake to righteousness, and sin not; for some have not the knowledge of God: I speak this to your shame."
He also wrote this in Gal 5:24..."And they that are Christ's have crucified the flesh with the affections and lusts."
No lusts equates to no sin...if you use James 1:14-15 as your guide to sinning.
"But every man is tempted, when he is drawn away of his own lust, and enticed.
Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death."