Simon, we are not just talking about "some book"...
It is a known fact that one's hemoglobin dropping below a certain level is lethal.
JWs choose to stick to a teaching that they know kills. DEAD.
It's not just some ambiguous writings that might be confused in the mind of a person with grey-matter-disease.
This is a teaching, accepted by sane persons, based on a lie, and one that kills.
It's not as if there's two ways to take it.
1) Don't take blood transfusions
2) God demands it
3) It'll kill you.
Your post does NOT reflect the realities.