the WT values the holiness of blood over the Jehovah's gift of life.
The whole idea of blood being holy and sacred was to prepare people for a great deliverance from the death penalty prescribed to free moral agents (unlike animals) such as ourselves. The great millstone around every person's neck was going to be overturned one day - "The Wages of Sin is Death"
Not just any blood is holy, that is the point the Watchtower fails to teach. They seem to teach that just any blood is sacred and holy, in itself.
Jesus' blood is holy because he was without sin, did not posses a sin nature like us and he willingly paid the death penalty for the sins each of us are guilty of, if we accept the payment along with the agreement to have our sin nature taken away. Many people don't want their sin nature taken away. God honors choices. Our choices have eternal consequences.
And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it;
For this is my blood of the new testament [or covenant], which is shed for many for the remission of sins. Mt. 26: 27, 28
Jesus shows in this scripture that his blood covenant is specifically for the remission of sins. Distinctively, the watchtower teaches that the New Covenant is for government positions in his Kingdom, and that it is only available to the mostly already dead 144K. (In other words, not available. Too bad you missed out)
The whole convoluted blood doctrine(s) that the Watchtower teaches is designed to hide in plain sight the simple teaching that permanent escape from sin and death is available for "whosoever will".
And let him that is athirst come. And whosoever will, let him take of the water of life freely." (Revelation 22:17)