I think you have a point here, although I would question even jesus having the power to forgive sins.
As in jesus forgave sins by the power of G_D, not by his own power.
Another point is that your analogy is flawed, if jesus was the eternal sacrifice, he could not have been the high priest.
The high priest does not sacrifice himself, instead G_D provided the sacrifice himself.
Are you saying Jesus is NOT G-D? Not part of the Blessed Trinity? That He is merely a human being? Of course being G-d incarnate, Jesus could and did forgive sins on His own authority. To say otherwise is to say that G-d is in fact not all powerful. Cleary He is all powerful, even when made flesh.
We can see that His Resurrection, for example, was entirely done through HIS OWN Divine power and authority, an authority that extends over even life and death, let alone sin - ‘freely I lay down my life and freely I take it up again’ (John 10:18).
Secondly, take a good long look at the part of the Gospels where Jesus forgives the sins of the paralysed man - especially the end, ‘all marvelled at G-D who had given such power TO MEN’ (Matt 9:8). They says this, of course, not understanding that Jesus IS G-d, just as they called Him the carpenter’s son not knowing that He wasn’t Joseph’s son.
G-d emphatically does not give the authority to forgive sins just to ONE man, being Jesus, but to more than one! It’s foretelling that Jesus would give this authority to others besides Himself.
Now how can you say Jesus was not the victim? John made clear that He was - ‘behold the Lamb of G-d who takes away the sins of the world’. The Lamb that takes away sin is a clear reference to the Passover Lamb, whose blood spared the Israelites from death, as well as the animal sacrifices offered by the Israelites for their sins. Jesus the lamb was definitely a victim! And if Jesus wasn’t the victim why was it HIS death which atoned for sin, and who or what WAS the sacrificial victim?
You don’t make any sense with a lot of what you’re saying.