Are you seriously going to deny Jesus the Title before He was on the Cross? Or are you saying by Blood He was the High Priest at Birth?
Then why this:?
Heb 2:17,18 “For this reason he had to be made like his brothers in every way, in order that he might become a merciful and faithful high priest in service to God, and that he might make atonement for the sins of the people. Because he himself suffered when he was tempted, he is able to help those who are being tempted.”
Heb 4:15 “For we do not have a high priest who is unable to sympathize with our weaknesses, but we have one who has been tempted in every way, just as we are— yet was without sin.”