I am puzzled by this. Just over 20 years ago my sister was fatally injured in a road accident. Her body was kept on the life support system for 48 hours after she was declared dead before the organs were harvested. This was standard practice then to ensure that there could be no accusations later that the patient was not dead, or their death was expedited by the removal of the organs. I assume systems have changed since then so all that is being proposed is a return to a previous practice.
Joanna, I have been in the circumstance you would find impossible. In a time before mobile phones I was away on a short holiday in France when my sister's accident happened, away for the two desperate days when every attempt was made to save her life, away for her eventual death. I returned home to find a grieving family and a sister who had died in my absence. To go to the hospital and see her still in Intensive Care, still breathing and warm, her skin still rosy, was an immense consolation to me. I knew she was dead but I could hold her warm hand as if she was still living see her chest rising and falling, as if she was breathing naturally and I could say my last goodby. I am so thankful my parents made the decision to donate her organs that resulted in her still being in suspended animation when I returned home. My last memories of my sister are not a of corpse but of someone lying in bed in a hospital room, sleeping, warm, looking her own dear self. I know this was an illusion but one that gave, and still gives infinite comfort.