It doesn't. The wages of sin are death. There is no forgiveness of sins without shedding blood (dying). That's the law of sin and death. All who are born into this world must pay this price. Jesus too had to face death, even though he never sinned. He was born into a sinful world where death is imminent. He offered himself as a living sacrifice, came to this temporal world, and led a sinless life conquering death through his perfect obedience. He rose in glory, giving us hope for ourselves after death. Death had no hold on him. This enabled him to be a worthy high priest and savior to imperfect creatures like ourselves. The sacrifice made was the life he led. Blood sacrifice equates to dying. It's just a fact of life in this temporal realm. While we are not able to live a perfect life, Jesus did. This is why his death and resurrection is so sacred. He was killed unjustly, but could not be held down. He rose in glory despite his enemies attempting to silence him through crucifixion. Jesus sacrificed himself by coming to this temporal world, and he did so to show us the path of life. He came to lead us home through love, reconciling us with the father of life.
He was going to die anyway. He was a man. The manner in which he died was horrible. Still, he never faltered from God's will. Even while being nailed to a cross he loved, forgave, and did not resist man's wickedness. To me this alone demonstrates God's will and nature in contrast to man's. Jesus is no scapegoat. We broke the law, so we are required to pay the penalty, which is physical death. Once that penalty has been paid, Jesus heals us and reconciles us with the father in the heavenly kingdom. The point of the cross and his resurrection is about showing us that there is life after death, and that death has no hold on Jesus, nor us because of him. He's stronger than death, and perfectly able to heal and give us life after the fact. The gospel is about hope, life, love, forgiveness, and mercy. The gospel, believe it or not, is truly the good news. It (like Jesus) is a light in a dark world.