Richard, cofty teaches that Jehovah gives his worshippers implied permission to eat blood from dead animals and from living animals and the blood from people too insofar as nobody is slaughtered. In that case the blood contains the life of the creature and should not be consumed (according to the Bible) Cofty's proof is that God gave Israel implied permission to eat dead animals ( found dead or torn by a wild beast.)
TD argument is that a blood transfusion is not the same as eating blood and human lives are lost based on interpretation of Acts which does not actually forbid blood for medical use according to TD. TD also says that the purpose of God's law is so people can live by it -not die by it as refusing a blood transfusion does.
TD also says that the Mosaic Law on blood is integrated with the entire law code and cannot be factored and used as law independent from the entire system of laws.