All sin is "willful".
Even in the OT there were provisions made for sin committed out of "ignorance".
Ever heard the phrase "Ignorance of the Law is no excuse"?
That comes from Num. 15:22-31.
"Observe How THE DISTINCTION BETWEEN GREATER AND LESSER SINS IS HERE STATED.
1. Some sins are described as sins of ignorance. The reference is to faults that are due to error or inadvertence. We all know, to our cost, how liable we are to these. Never a day passes but we omit duty and commit faults, either because we knew no better, or because we were "off our guard" and stumbled before we were aware. These are sins of infirmity, such as cleave to the best of men in the present life.
Observe THE LAW WHICH IS LAID DOWN WITH REFERENCE TO THE TWO KINDS OF SIN.
1. When the party - whether it be the congregation or an individual Israelite - who has sinned inadvertently becomes aware of the sin, a sin-offering is to be presented with the accustomed rites, and the sin will be forgiven (verses 24, 25, 27, 28). The point to be noted here is, that however much the sin may have been due to mere ignorance or inadvertence, the law demanded satisfaction; that is to say, Transgression of God's law is transgression still, though done through mere heedlessness or error. Ignorance and heedlessness may extenuate, but they do not justify; nor do they exempt from suffering the consequences of evil doing. Nor ought this to be deemed strange or harsh. The same principle prevails in human governments. A transgressor does not escape the penalties annexed to his acts because he did not know they were forbidden, or because he acted recklessly."
Source
And still, you both miss what is being said.
I may desire to sin no more, I may try to follow the Spirit as best as I can, I may have the heartfelt desire inward to Obey God always. But the fact remains that from the day I was born, until the day I die, and Jesus returns and I am made like Him, we, even Christians, are going to sin, whether willfully or out of ignorance.
John knew this when he wrote 1 Jn. 1:8-10.
Walking in this life, "sinless" as you say, even when directed by the Holy Spirit, was a mark nobody has met. Peter couldn't do it. Paul couldn't do it.
Has the Christ event in your life so eradicated sin in your life that it is impossible to sin?
No. Even Paul wrote:
"For we know that the law is spiritual: but I am carnal, sold under sin. For that which I do I allow not: for what I would, that do I not; but what I hate, that do I. If then I do that which I would not, I consent unto the law that it is good.
Now then it is no more I that do it, but sin that dwelleth in me. For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
For the good that I would I do not: but the evil which I would not, that I do. Now if I do that I would not, it is no more I that do it, but sin that dwelleth in me. I find then a law, that, when I would do good, evil is present with me. For I delight in the law of God after the inward man: 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." -Rom. 7:14-23 (KJV)
It is written there for you to see. Twice in those verse we see that Paul desired to every fiber within him, to do what God wanted him to do, but sin was still present in him causing him to stumble and sin.
To walk in this life without sing is a worthy goal, but because we live in this flesh, because sin is still a part of us, we cannot, will not achieve that mark.
I'm so sorry you ignore scripture, or just won't admit it.
God Bless
Till all are one.