In life threatening situations requiring blood, the risk of dying without blood far outweighs the risks associated with blood transfusions.
Exactly. Nobody goes into a hospital and says " hey i have a slight headache, can i have a blood transfusion?"
I don't like the idea of getting blood from another person either, and i will avoid it as much as possible, but if i'm put in a situation where the choices are dying or getting a blood transfusion, then my choice will be clear.