The light is suppose to be progressive, moving us two steps forward, and hopefully none back. Jehovah does not test us, or try to trip us up with strange un-biblical teachings. I can remember how the merits of avoiding blood, were in full swing during the heavy metal big haired days of the 1980s.
We were told how lucky we were, that we would not be contracting "HIV-AIDS", "HEP-C" some other rare blood disorders, this made us look like we were ahead of the paradigm, this even made sense and we felt good about it. Now what about those "organ transplants" our brothers in the wild 1960s were told were bad? Reasoning leaders of the Organization thought, how could this not be a form of canabilism?
Who decided this was no longer bad, and it was neutral and now good? Was there a prayer group like Acts 15 speaks of, and all the higher level brothers prayed with their might, and this new light came forward "All the brothers in New York and the Holy Spirit have concluded, transplants are ok, just abstain from blood and you will prosper! Good health to you witnesses!"
Who was watching over the "watchers" while we were asleep?