Another way to look at it is, many in church identify with Romans 7 because they are not born again. They battle the flesh with the flesh using nothing but law as their motive. We have a false legalistic gospel today they wield as a substitute for the Ten Commandments.
But in the power of the Holy Spirit, we overcome the flesh and even retrain it to a degree. We seldom sin outwardly, but battle temptation on a daily basis. But like 1stCentury said, we really do not want to sin and seek to avoid it.
I've learned that there's nothing good in the flesh (sin nature) that can be retrained or reformed, like Paul said, "For I know that nothing good lives in me, that is, in my flesh." (Romans 7:18) The only solution for the flesh is death--to take up my cross daily (Luke 9:23) and consider myself to be dead to sin (Romans 6:11), having been crucified with Christ. (Galatians 2:20)
1 Peter 2:24--"He Himself bore our sins in His body on the cross,
so that we might die to sin and live to righteousness; for by His wounds you were healed." Through the cross, Jesus gave us the power to die to sin so that we can live to righteousness.
I've come to see this walk of faith as choosing on a daily (even moment-by-moment) basis to count my flesh as crucified (when it
seems to be very much alive) and live in obedience to the Holy Spirit. Of course, all of this is done by the power of the indwelling Holy Spirit by grace through faith. I could NEVER live this way apart from the Him.