FYI: I am not an inerrantist (someone who believes the Bible does not contain errors), but I do believe the Bible points us to God. Therefore it is authoritative. I will try to answer you biblically for the sake of some of my other fellow believers and provide you with examples as to how what the Bible says is relevant to what you're asking. I hope all of us learn something new about each other and grow as individuals.
Why use death to bring life?
Many religions such as Buddhism value life. The Buddha went among the poor, found his enlightenment (his reason for living not dying; and prevent others from dying, for example) and helped others by giving his service, his teachings, and his a way for people to understand the nature of life by letting them help themselves.
Biblical christian achieves this through the death of christ. Everything is through "the death of" something say an animal, death/sacrificing ones health by food fasting, and the saints and christ their lives.
While I know how he died and the reasons the bible gives for how he did, the bible doesnt talk about how blood from both animal and human can literally wash away sins.
Does the bible talk about the nature of blood?
How can the sacrifice of ones life bring life?
We look down on those who commit suicide but look up to those who killed themselves for their faith.
How are the two different not by their reasons but by both taking their own lives in it
selves?