Why did EGW write this then?

In any case, to say that Christ's humanity was faulty and imperfect would push you past the edge of orthodoxy. The defenders of the FB would be displeased.

Christ CHARACTER is not in question.

The Bible testimony is clear - "in the likeness of sinful flesh" (Romans 8:3). "He took upon himself fallen, suffering human nature, degraded and defiled by sin." {YI, December 20, 1900 par. 7}

After probation closes the 144,000 will be tempted from within by their sinful flesh nature without incurring guilt or condemnation, so too, Jesus was tempted from within by His sinful flesh nature without incurring guilt or condemnation.

When we place our will in unison with the will of God, the obedience that was exemplified in the life of Christ will be seen in our lives. God requires us to keep His commandments, that we may cultivate the attributes which made the Saviour's life pure, holy, and undefiled. {ST, December 20, 1899 par. 2}

There are sinners in Zion who need to repent of sins that have been cherished as precious treasures. Until these sins are seen, and thrust from the soul, until every faulty, unlovely trait of character is transformed by the Spirit's influence, God cannot manifest Himself in power. There is more hope for the open sinner than for the professedly righteous who are not pure, holy, and undefiled. {RH, February 7, 1957 par. 9}

Many place themselves where they cannot recognize his grace and his salvation. They are under a delusion as to what constitutes Christianity. And while man refuses to become pure, holy, and undefiled, as God's law requires him to do, he is walking away from Christ. {RH, February 15, 1898 par. 10}

By beholding the character of Christ you will become changed into His likeness. The grace of Christ alone can change your heart, and then you will reflect the image of the Lord Jesus. God calls upon us to be like Him--pure, holy, and undefiled. We are to bear the divine image.--Lt 84, 1899. (3BC 1164.) {2MCP 578.3}

God did for us the very best thing that He could do when He sent from heaven a Sinless Being to manifest to this world of sin what those who are saved must be in character--pure, holy, and undefiled, having Christ formed within. He sent His ideal in His Son, and bade men build characters in harmony with this ideal.--Letter 58, 1906. {3SM 132.5}

Study the life of Christ in this respect. Follow Him from the manger to Calvary, and act as He acted. The great principles which He maintained, you are to maintain. Your standard is to be the character of Him who was pure, holy, and undefiled.—Youth’s Instructor, June 30, 1898. {BLJ 120.5}

Those who profess to be disciples of Christ should be elevated in all their thoughts and acts, and should ever realize that they are fitting for immortality, and that if saved, they must be without spot, or wrinkle, or any such thing. Their Christian character must be without a blemish, or they will be pronounced unfit to be taken to a holy heaven, to dwell with pure, sinless beings in God's everlasting kingdom. {ApM 29.2}

A well-balanced character is formed by single acts well performed. One defect, cultivated instead of being overcome, makes the man imperfect, and closes against him the gate of the Holy City. He who enters heaven must have a character that is without spot or wrinkle or any such thing. Naught that defileth can ever enter there. In all the redeemed host not one defect will be seen. {LHU 346.4}

The angels of God are watching the development of character. Angels of God are weighing moral worth; and we are to obtain a fitness here to join the society of sinless angels. Do you expect that when Christ comes he will give you that fitness? Not at all. You must be found of him without spot, without blemish, or wrinkle, or anything like it. Now is the watching and trying time. Now it is the time to obtain a preparation to abide the day of his coming, and to stand when he appeareth. {RH, April 19, 1870 par. 10}

If you keep saying Jesus was faulty and imperfect . . .

Arnold, the 144,000 will be "without fault" after probation closes all the while resisting the unholy clamoring of their fallen flesh nature.

If you keep saying I say so you might believe it. But the truth is I don't keep saying it. I have never said it. Saying Jesus was sinful because He partook of sinful flesh is like saying believers are divine because they partake of the divine nature. Partaking does not make us so. It merely enables us to imitate the sinless example of Jesus, to nurture, develop His pure, holy, undefiled traits of character.

Jesus was not sinful, fallen, faulty, defective, imperfect - His human nature was.