No you are adding what is not there. A plain reading of the text does not even imply what you are inferring. Sin is sin in verse 26. How do we know. Because the text goes on to say in reference to this sinning willfully that one under the old dichotomy died without mercy if they sinned willfully, rejected the Law of Moses. Now we have been perfected by the Law is in our hearts and minds and we have been sanctified through the blood of Jesus. After receiving the knowledge of this truth how much sorer punishment suppose we be thought worthy who has counted the blood of the covenant as nothing wherein he was sanctified and has done despite, insulted the Spirit of THE grace, the Gift of the Law, the Spirit in the heart and Mind?
Heb 10:26 For if we are sinning willingly after we received the knowledge of the truth, a sacrifice is no longer remaining (for) sins;
Heb 10:27 but a certain fearful expectation of judgment and fervour fire are at hand, that the adversaries are being about to be devouring.
Heb 10:28 Anyone who set aside (rejected) the law of Moses is dying (without) compassions (on) two or three witnesses:
Heb 10:29 Are ye thinking of much worse punishment the one who trampled upon the Son of God and esteemed common the blood of the covenant (in) where He was sanctified, and insulted the Spirit of the grace will be counted worthy?
Heb 10:30 For we know the One Who has said, vengence is belonging to Me, I Myself will pay back, the LORD is saying: and again, the LORD will judge His people.
This is exactly why I follow Jesus in his assessments instead of Paul. It isn't a matter of sinning willfully it is a matter of god taking away your sin, 1 John 3. He really does take away the sins of this world.
If you are of Christ, Gods anointed, Christ in you, sin cannot be at all, you are either a sinner and without the Christ or you are of Christ and without sin, it cannot be both, sin and holiness cannot inhabit the same temple at the same time.
1John 3:9 we who are born of God it is impossible to be in sin.
If you do sin then you are 1 John 3:8 and of your father the devil. read it.
Sin is not killing, stealing, chasing the neighbors wife, sin is separation from having Gods Spirit which simply is Love for God is Love. Those things are of the law and only result from that sin, from that separation from Him.
Jesus was very clear to be ye therefore perfect even as your Father in heaven is perfect. How can that be? The Father in Heaven is Love for God is Love and man is the temple of Him, and Love is the only thing on this planet that is perfect. It can't be changed Love is the same yesterday as today and will be the same tomorrow, everything else changes and imperfect. For God is Love and man is the temple of Him.
Dont confuse the imperfect flesh man with the perfect spirit man.