Not sure how you can say what you are saying about
Romans 7, when Paul STARTS OUT that section (
in vv.1-4), by saying,
1Know ye not, brethren, (
for I speak to them that know the law,)
how that the law hath dominion over a man as long as he liveth?
2For the woman which hath an husband is bound by the law to
her husband so long as he liveth; but if the husband be dead, she is loosed from the law of
her husband.
3So then if, while
her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.
4Wherefore, my brethren,
ye also are become dead [/have been put to death] to the law by [by means of] the body of Christ; that [for / eis] ye should be married [/joined] to another,
even to him who is raised from the dead,
that [SO THAT] we should
bring forth fruit unto God.
Yes, in Romans 7:1-6, he is laying the groundwork, based on Torah ("through the Law I died to the Law" Gal 2:19--the Law, Itself, is the basis for freedom from the Law, thus the Jew's freedom from It
is an integral part of his "keeping" It!), for why the Jews should not think Paul's doctrine of freedom from the Law is odd, and to stop thinking they should serve through the Law ("You call yourself a Jew, and boast in the Law..."), and start thinking they should serve through the Spirit.
Then, in vv7-24, he is describing the life of a Jew "when we
were in the flesh" (Christians are "not in the flesh but in the Spirit Ro 8:9), "under Law", which Ro 6:14 says is a life of being "mastered by sin"--and, so, you see that the life described in vv7-24 is the life of a Jew being "mastered by sin" by "the strength of sin" which "is the Law" (1 Co 15:45).
So, the lost Jew cries out for a Deliverer (as the children of Israel did in Egypt--our salvation is compared to the Jews' salvation from slavery in 1 Co 10), and Jesus (Who is "the prophet like Moses [the Deliverer]") comes and sets him free.
He is progressing through that timeline.
Then, we see the state of the Christian: "the law of the spirit of life in Christ Jesus has set me free from the law of sin and death in the flesh".
So, no, vv7-24 aren't about a Christian, it's just a run-through of the life of a lost Jew before he is saved, then him crying out for a Deliverer, him getting deliverance (aka salvation), and him rejoicing that he is "not in the flesh but in the spirit", because
if he were "in the flesh", he would be a servant of Sin's Law, but, since he is "in the spirit", he is a servant of God's Law.