That is not in line with the "Jesus is God" doctrine. He knew who he was while he was human. Colossians 2 said Jesus had all treasures of wisdom and knowledge, and Matthew said he had all power in Heaven and Earth. This is not an ignorant barnacle.
Jesus as Man didn't have any divine cushions that made his sacrifice less extreme.
Not a barnacle? Paul says he "emptied himself." Kenosis. In the Psalms, speaking in prophecy, the Messiah says "Scorned by men and despised by the people, I am a worm, not a man."
Inasmuch as Jesus Christ is True Man, He too had this status: his human will acted in faith and trust, not in divine omniscience.
This is why the Epistle to the Hebrews says that Jesus "though he was the Son, yet he learned obedience by the things which he suffered."
Why "learned," if He was acting on the basis of divine omniscience?
Why "obedience," if He acted in His divine nature as Sovereign Lord of all?
Why "suffered," if He dwells in endless bliss?
Why? Because He was emptied of all the glory of His divinity.
Because "for us men, and for our salvation, came down from heaven, and was incarnate by the Holy Spirit of the Virgin Mary, and was made man, and was crucified also for us under Pontius Pilate: He suffered and was buried."