"If we say we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. If we say we have not sinned, we make Him out to be a liar, and His word is not in us." (1 John 1:8)
In the scripture above, John is referring to those who are in Christ, not unbelievers. Though we are in Christ, we are still sinners. But when we received Christ we were credited with righteousness and reconciled to God. God sees us through the spectacles of Christ as righteous, though we ourselves are still sinners. When the gathering occurs and we go from mortal to immortal, then we will be free of the sinful nature.
There's a difference between HAVING sin and BEING one.
The scripture you are referring to talks about us HAVING sin in us.
That doesn't make us sinners.
Sinners don't have the new bottle skins for the NEW WINE, but the righteous do.
Let me give you some example of what God has to say about sinners.
Gen_13:13 But the men of Sodom were wicked and sinners before the LORD exceedingly.
Psa_1:5 Therefore the ungodly shall not stand in the judgment, nor sinners in the congregation of the righteous.
Psa_26:9 Gather not my soul with sinners, nor my life with bloody men:
Psa_51:13 Then will I teach transgressors thy ways; and sinners shall be converted unto thee.
Pro_13:21 Evil pursueth sinners: but to the righteous good shall be repayed.
Mat_26:45 Then cometh he to his disciples, and saith unto them,
Sleep on now, and take your rest: behold, the hour is at hand, and the Son of man is betrayed into the hands of sinners.
Joh_9:31 Now we know that God heareth not sinners: but if any man be a worshipper of God, and doeth his will, him he heareth.
Rom_5:8 But God commendeth his love toward us, in that,
while we were yet sinners, Christ died for us.
Rom_5:19
For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.
1Ti_1:9 Knowing this, that
the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for
sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
Heb_7:26 For such an high priest became us, who is holy, harmless, undefiled,
separate from sinners, and made higher than the heavens;
Jas_4:8 Draw nigh to God, and he will draw nigh to you. Cleanse your hands, ye sinners; and purify your hearts, ye double minded.
We, who are born again, are not sinners.
We sin, yes, but are not sinners in the eyes of God.
I think the scriptures above prove that.