Your inference is that God's "new creature" is just like the old one that was killed at water baptism into Christ's death.
It isn't.
Christ will not reside in a polluted temple.
I don’t take his understanding of the flesh vs the Spirit to mean the “new creature” is like the old one.
I say then: Walk in the Spirit, and you shall not fulfill the lust of the flesh. For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another, so that you do not do the things that you wish. Galatians 5:16-17
Do you understand that the born again believer, who has the Spirit of God within them has a body that still contains sin, that is opposed to the Spirit.
- For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another...
Our physical body contains sin, that manifests itself by lustful cravings that are contrary to the righteous desires of the Spirit within us.
If we yield to the sinful desires of the flesh so that we obey it, rather than obeying the desires of the Spirit, we are practicing unrighteousness rather than practicing righteousness.
Here is a list of some of the manifestations of the flesh.
Now the works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness, idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies, envy, murders, drunkenness, revelries, and the like; of which I tell you beforehand, just as I also told you in time past, that those who practice such things will not inherit the kingdom of God. Galatians 5:19-21
Again, here are the things the physical body, the flesh of born again, baptized Christians desires to do:
adultery,
fornication,
uncleanness,
lewdness,
idolatry,
sorcery,
hatred,
contentions,
jealousies,
outbursts of wrath,
selfish ambitions,
dissensions,
heresies,
envy,
murders,
drunkenness,
revelries,
and the like; (meaning anything like what’s mentioned above)
Here is a list of what the Spirit within us desires:
But the fruit of the Spirit is —
love,
joy,
peace,
longsuffering,
kindness,
goodness,
faithfulness,
gentleness,
self-control.
Against such there is no law.
We must learn to do things that strengthen our inner man in which our resolve to walk according to the Spirit is stronger than the desires of our flesh.
Do not be deceived, God is not mocked; for whatever a man sows, that he will also reap. For he who sows to his flesh will of the flesh reap corruption, but he who sows to the Spirit will of the Spirit reap everlasting life. Galatians 6:7-8
- For he who sows to his flesh will of the flesh reap corruption,
- but he who sows to the Spirit will of the Spirit reap everlasting life.
Investing our time and effort towards godliness, rather than the things of this world is how we will overcome.
Peter says it this way, and he says this to born again, baptized Christians. — To those who have obtained like precious faith with us by the righteousness of our God and Savior Jesus Christ:
Grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord, as His divine power has given to us all things that pertain to life and godliness, through the knowledge of Him who called us by glory and virtue, by which have been given to us exceedingly great and precious promises, that through these you may be partakers of the divine nature, having escaped the corruption that is in the world through lust. But also for this very reason, giving all diligence, add to your faith virtue, to virtue knowledge, to knowledge self-control, to self-control perseverance, to perseverance godliness, to godliness brotherly kindness, and to brotherly kindness love. For if these things are yours and abound, you will be neither barren nor unfruitful in the knowledge of our Lord Jesus Christ. For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins. 2 Peter 1:2-9
But also for this very reason, giving all diligence,
add to your faith —
virtue,
to virtue knowledge,
to knowledge self-control,
to self-control perseverance,
to perseverance godliness,
to godliness brotherly kindness,
and to brotherly kindness love.
- For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins.
JLB