So, reconcile what you've written here with the following verses:
Galatians 5:17
17 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.
Who is Paul writing to here? Christians in the church at Galatia.
Romans 7:15-23
15 For what I am doing, I do not understand. For what I will to do, that I do not practice; but what I hate, that I do.
16 If, then, I do what I will not to do, I agree with the law that it is good.
17 But now, it is no longer I who do it, but sin that dwells in me.
18 For I know that in me (that is, in my flesh) nothing good dwells; for to will is present with me, but how to perform what is good I do not find.
19 For the good that I will to do, I do not do; but the evil I will not to do, that I practice.
20 Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me.
21 I find then a law, that evil is present with me, the one who wills to do good.
22 For I delight in the law of God according to the inward man.
23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.
If, as you say, real Christians no longer sin, then what is Paul describing here? He must be describing himself in a saved condition because he writes of "delighting in the law of God according to the inward man," which an unbeliever, who is "dead in trespasses and sins" (Eph.2:1), would not do.
1 John 1:8-10
8 If we say that we have no sin, we deceive ourselves, and the truth is not in us.
9 If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
10 If we say that we have not sinned, we make Him a liar, and His word is not in us.
The apostle John is writing to believers in his first letter, not the spiritually unregenerate. It seems he is telling them that none of them can make the very claim to sinless perfection you say they must make if they are true Christians.
Selah.