Only those not "in Christ" do.Obviously, a strong person doesn't cave in to the enticement and temptation of sin. Only weak people do. So, obviously, James is talking about weakness. Weakness that is, perhaps, the result of ignorance of the difference between right and wrong, or about the power of God over sin that is within us.
In other words..."obey and live".Paul talks about the weakness of the believer here:
17But thanks be to God that, though you once were slaves to sin, you wholeheartedly obeyed the form of teaching to which you were committed. 18You have been set free from sin and have become slaves to righteousness.
19I am speaking in human terms because of the weakness of your flesh. Just as you used to offer the parts of your body in slavery to impurity and to escalating wickedness, so now offer them in slavery to righteousness leading to holiness. Romans 6:17-19
"USED TO".He's talking to people who "once were slaves to sin", and "set free from sin", and "have become slaves to righteousness", and who "used to offer the parts of your body in slavery to impurity", and yet he is addressing them because of the "weakness of (their) flesh". Weakness is indeed a reason why people "set free from sin" and who are "slaves to righteousness" sin.
Not since rebirth from God's seed however.
That is one of the accommodations for continued sins that God's pastors and prophets abhor.Sometimes we are weak and don't always walk in the freedom we have from the slavery of sin. But we have the continual intercession of the blood of Christ in heaven forgiving us as God heals us and strengthens and trains us up to live out the righteousness we have within us by the Holy Spirit which we received through faith in Him.