Cofty points out that since God gave permission to the Gentiles to eat animals found dead (unbled!) Det 14:21, God also established by doing so that the blood of such dead animals is not sacred because had it been sacred it could not be eaten along with the flesh by anyone including Gentiles without violating God’s law to mankind (Gen 9:4)
In Nu 15:31, the penalty for deliberately violating any command stated in the law was death, but even if someone could be executed for eating animals found dead (unbled) for deliberately doing so, the person would be executed for despising God’s command; that would be the charge against such person and that would be the reason for his guilt and execution –despising God’s command; eating an animal found dead (unbled) would not be the reason for such person’s execution because there is no penalty stated in the law for doing so except the resulting state of ceremonial uncleanness –but not death or any other penalty. Albeit the act of a Jew eating an animal found dead did not incur the death penalty and that is the point –according to cofty.
(Genesis 9:4) 4 "Only flesh with its life—its blood—you must not eat. . .” is God’s command to mankind, so by God giving Gentiles permission to eat an animal found dead (unbled) as he seemingly does does in Deut 14:21, a distinction is made between the blood of a slaughtered animal that is going to be eaten (and it is forbidden for such animal to be eaten by anyone whatsoever without being bled) and the blood of an animal found dead which is allowed to be eaten by Gentiles. There is a distinction between both sorts of blood.
Cofty appears to say that when a person eats a found dead unbled animal, according to Gen 9:4 such person is also eating the blood of such animal, but unlike Gen9:4 the life of such dead unbled animal is not in the blood with the carcass (that is to say God does not require such blood to be poured out) and that is why God allows such blood to be eaten with the carcass. And now cofty says that technically it would be as if the blood of the dead animal is eaten by itself, and by derivative: ” Blood was sacred insofar as it represented a life that had been taken by a human.” –as cofty argues in his OP.
But is that the way Jehovah sees it? Can a worshiper of Jehovah consume blood taken from live humans or from live animals? -to drink a couple of glasses of blood or more from a live cow or from a live human; it sounds shocking but is it a sin considering cofty's theory? That is the question that needs to be answered.