This is what Matthew Henry's Concise Commentary has to say about that:<quoted text>
The way I see it is based on Deuteronomy 12:16
"Only the blood ​YOU​ must not eat. On the earth you should pour it out as water."
I reckon if it's poured out on the ground like water, then it wouldn't be for eating, collecting, drinking, putting into veins, mixing with bits of human body parts on computer chips, and so on.
I go with Jehovah knows what he's talking about, and what's best for us.
The main reason why blood was forbidden of old, was because the Lord had appointed blood for an atonement. This use, being figurative, had its end in Christ, who by his death and blood-shedding caused the sacrifices to cease. Therefore this law is not now in force on believers.
Don't know how that figures in to everything but its interesting to think about.