Using a generic term when a specific term is more appropriate serves no other purpose but to obfuscate and confuse.
Precisely.
In 1950 Watchtower published the following statement:
“If transfusion of human blood in the modern way was not practiced back there in Noah’s day or in Moses’ day, there was no need for God to expressly state a law against it; just the same as he included no law against smoking tobacco in his commandments to his typical people.”
Here's the problem with that statement by Watchtower. To Noah God did make a statement about one use of blood, which was the act of eating blood (of animals killed as food). Nothing was said to Noah about other uses of blood, such as the ancient and various uses of blood for medicinal transplantation that then existed. If we accept what Watchtower says above then we have no reason to think God ever expected humans to refrain from non-eating uses of blood, and particularly when that use would help preserve health/life.
Because the ancients (like Noah) did not have our modern technology and know-how to transplant blood like doctors of today does not mean the ancients did not transplant blood in various ways available to them for medicinal value.
See:
Medicine Practiced in Noah’s day — and Blood
Ancient Blood Transplantation, and Noah
Historical Medicinal Uses of Blood