Enlightened people like us can think this through and see the position for what it is.
When you are in the bosom of the cong, and subject to the thinking of the order, it is only possible to think this way;-
"The Organisation knows best. I believe that Jehovah will be hurt and angry with me should I take blood. I will not get everlasting life.
Eternal benefits, or tempory life in this system? I chose for eternity , and since I love God - I want to do his will"
There is no rationalisation, no working out of self interest.I also find that any dub I know still believes that any blood product is sure to give them Aids, Hepatitus, or something equally nasty.
When that is all you know it is no surprise they will act as they do, as we would once have done.