I'm with others on this; blood was to represent a life taken, be it animal or human.
Are Jehovah’s Witnesses competent to resolve the issue of blood transfusion? No!
There are so many things that don't make sense from a doctrinal point of view. Why are blood fractions allowed but not whole cells and platlets? Why can JWs receive blood fractions but not give blood for blood fractions? Why can a JW have blood salvaged during in an operation but not pre-store their own blood? Why if it is the case of a minor are they happy to delegate responsibility to courts?
As an elder I once asked these to our HLC members but didn't get much of a straight answer. They just stick to the party line; "whole blood bad, fractions fine".