I do understand the dilemma. I have considered this question a a lot . I was offerer blood while in hospital but it was not at all urgent so I had no problem declining it. It is so hard when your close family are believing Witnesses. You think of the problem that you would be causing them . How would home life be afterwards? Is it worth it?
At my time of life , living with a wife who would be drawn into the consequences, who is also my carer for disability….. I seriously wonder if it would be worth sacrificing my happy home life for a few more years of living? Those extra years are going downhill anyway…..
Of course the situation would be totally different for other people and I would never tell anyone what to do. I am just pointing out that although the actual taking of blood would be a no-brainer , the consequences are more complicated.