Eating is getting eternal life. Drinking is remitting sins so we can be made holy and righteous to enter and get eternal life. The scarlet thread let the soldiers know they were to spare all in that house. Blood remits sins and makes us holy, and THEN we can receive eternal life and not die. Today we need to be made sinless so that we can get eternal life within us.
Fruit has no blood in it.
Adam tried to solve problem with only vegetation. Fig leaves were bloodless God had to take something with blood to help him. Cain did not think he needed blood either. Thought he was alright since it was ADAM and not him that sinned. Many today do not believe they are sinners since they did not hurt anybody.