Fisherman....A subtle shift in the significance of blood has taken place in your mind and that of many others.
According the author of the Genesis dietary directive, life is sacred, bleeding a animal ensured the life was not present in the animal when it was eaten.
However in time the close relationship of blood with life morphed into a magical property whereby blood became synonymous with life itself. Even so, Jewish thinking then and today denies blood had value for forgiveness of sins. Animal sacrifices were an ancient tradition all over the middle east so naturally worshipers of Yahweh did it as well. However, they were gifts of thanksgiving or a reminder of the failures to keep perfect obedience, not a tool of redemption. At some point the novel idea that blood could buy forgiveness crept into certain early Christian thinking. Not all Christians adopted this view, branches of Christianity existed without the novel idea of blood redemption at all. But among the circle of Christians represented in Acts two views are in tension, Christians like Paul understood the blood of Christ alone had significance while certain other Jewish Christians felt the blood of animals had magical value yet. JWs cling to this later view in contradiction of Paul.