She was 89, and was already showing so many near-death symptoms of critical aging - he said that she was mostly a vegetable, but yet consciously experiencing antagonizing feelings. A blood transfusion would've only endured her suffering as the body further degenerated into its full vegetable state within a matter of weeks or so. Poppin couldn't just respect that she knew it was her time and leave it at that, rather than twisting it around and turning it into a bloody red herring.
Ok with science that the big bang theory requires that fundamental scientific laws do not exist for the first few minutes, but not ok for the creator to defy these laws... 