There must be a correlation between a symbol and its equivalent in reality.
Some people believe God has provided clean water
Some people believe that God has provided clean water to the earth to sustain life. Others think that water is a product of casual processes, natural cycles, and laws. But all of them knows that clean water is suitable for washing.
The blood cannot wash anything neither as a symbol nor literally. The symbol of blood is always associated with evil and death.
In the Old Testament, such a comparison is made:
“though your sins are like scarlet, they shall be like snow;
though they are red like crimson, they shall become like wool.” (Isaiah 1:18)
Red is likened to contamination and sinfulness, and white to purity and righteousness.
Some people think that, like some earth master, God also would accept gifts. That’s why they offer Him sacrifices. But, if you offer a bribe to a respectable person, you will disgust and insult them, and you will disgrace yourself.
The universe and life stand in unshakable laws.
Only man is gifted with the ability to choose and break them.
In fact, complying with Divine principles is righteousness—a prerequisite for а normal and blessed life.
The misuse of natural laws is a sin. This leads to the loss of the right to life. And those who become aware and returns themselves in the path of justice, they will live. Sacrifices and blood cannot do this for them.