I`m going back over 30 years ago when the understanding then of the scriptures relating to blood was:
"blood was to be poured out on the ground ,and not to be used for anything "
Blood and Bone Fertilizer was not even to be used by a JW on their gardens ,it was a DF offence. to continually use it.
Jehovah God has not revised the Bible these past 2000 years .
How is it ,noting that by their own admission the GB is not inspired or directed by Holy Spirit they can re-interpret scriptures to allow fractions ? of this and that ? and ban other components of blood ? as not acceptable ?
When did Jehovah intervene and tell them about fractions /components of blood and what is acceptable and what is not.?
Especially so when they admit they can make mistakes ? their not perfect ?
They are not inspired by Jehovah ,their not directed by Jehovah ,so where do they get off telling us what is acceptable to God and what is not ?