Romans 7:14-25 is Paul using the literary tactic of IDENTIFICATION to identify himself as carnal in order to define carnality in order that he might win the carnal person to Christ.
The passage in question identifies "the law of sin and death" which is that "when I would do good, evil is present with me" (v.21).
Paul is clear in mentioning, in Romans 8:2, that he now has victory over the law of sin and death.
If Paul were carnal when he wrote Romans 7:14-25, then he was not holy; and if he was not holy, then he was not penning holy scripture (see 2 Peter 1:21).
A case can be made in scripture that the Romans 7:14-25 believer is not actually saved. But even if he is saved, a point that can be made is that it is an important attitude to have that is spoken of in verse 24, that a man be discontented with a lifestyle of sinning.
It is when a man has this attitude that the doctrine of entire sanctification (1 Thessalonians 5:23-24 (kjv), Hebrews 10:14 (kjv), 1 John 3:9 (kjv)) becomes good news to him.
I would say because of this that if the doctrine of entire sanctification is not good news to anyone, that they are farther away from salvation than they think and they really need to check themselves before they wreck themselves.
Romans 8:2 is speaking from the perspective of the spirit. Romans 7 is phrased as a current state of being rather than something from his past. The take away is "yes, there is temptation and an urge to sin" which comes from his carnal body, but his spiritual body is pure and true through.
Paul using the literary tactic of IDENTIFICATION to identify himself as carnal in order to define carnality in order that he might win the carnal person to Christ.
To those with the law he appears as though he has the law, etc. Yes, but he states in Romans 9:1 that he is not lying. It would not be consistent to assume he was being facetious in Romans 7. His identification would have to be true, even if we explore the possibility of exaggeration, Paul still speaks of having an evil/sinful nature present within him.
I see the appeal of trying to frame this as "a full sanctification" that completely erases sinful nature right then and there, but it doesn't jive well with the way that Paul is explaining it. The concept is that the spirit is sanctified and the carnal nature is nullified by walking in the spirit. Any time we see "I" or "you" we have to wonder whether these passages are talking about the "you" and "I" that is the spiritual nature, the carnal nature, or the entirety of both spiritual and carnal.
1 John 3:9 is talking about the part of us that is born of God, not the carnal being.
In Hebrews 10:14, it is still the spirit that is sanctified
In 1 Thessalonians 5:23-24, this still points to the spiritual self at the helm of the mind, soul, and body, not the carnal self.
That perspective of sinner and saint is consistent with the concept that even someone that is saved may have a bad day and become angry in the moment at a neighbour. There is no explicit statement in scripture that I'm aware of that states that one becomes wholly perfect at the moment of being in Christ. A part of that person may very well be, but not the whole of that person. The danger in exploring that thought is that by finding evidence of sin, that would render someone categorically never saved to begin with.
If Paul were carnal when he wrote Romans 7:14-25, then he was not holy; and if he was not holy, then he was not penning holy scripture (see 2 Peter 1:21).
There is a clear continuity from Romans 7 to Romans 9. The holy part of him was that which wrote the scripture. The holy part of him was that which made an observation of the carnal part of him. There is an important nuance in this, and Paul goes through great lengths in an attempt to discuss this.
I would say because of this that if the doctrine of entire sanctification is not good news to anyone, that they are farther away from salvation than they think and they really need to check themselves before they wreck themselves.
If one is observing entirely from their spiritual self, it can appear as though entire sanctification has been achieved. Paul's observations, and other notes in the Bible basically point to the idea that the sinful nature is still a part of the complete "you" even if you are able to think and experience clearly from an sanctified state. It would be like making the observation that you snore in your sleep but differentiating between the "you" that is conscious and the physiological "you" that snores. We still have to humbly take accountability for the fact that although we can see with a clear mind through the grace of God (or perhaps mistakenly believe God always gives us the same clarity), there are parts of our carnal nature that still remain. Wouldn't it be nice to leave that carnal nature behind? Paul talked about his yearning to be with God, but that by being present in the carnal world, he was able to spread the word.
Just because we think we don't sin doesn't make it true. We see this theme in many passages including 1 John 1:8.