There is no need to twist this into some contorted pseudo magical world of faith and spirit. Its generally only JWs and ex JWs who even see blood transfusion as an issue. It's not unless you have a rare blood type or have a cummunicable blood disease.
The concept of a blood sacrifice for sin is abhorrent and mature, grown up people should understand that the very concept is vile and immoral. There is no glory in the pretend concept of arbitrary sin being paid for by the real blood sacrifice of anyone. The myth of Christ is nothing to do with blood transfusions or magical kingdoms, it is simply a way for people to control other people and to soothe their conscious minds regarding the inevitability of death and the fear of pain.
I ache when I see otherwise sensible people give themselves so completely to a crazy delusion that they are incapable of seeing why what they say is bonkers and then allow their baser selves free reign via their delusion. I don't want to shun you but my god demands it.