squeak – You know of one case. I know of many. Yes, many people, including children, are not receving transplants because they have a poor prognosis and/or they have other conditions that will most likely cause the transplant to be rejected. Those that are determined to have a lasting benefit will be put on the transplant list. Of those, the one with the greatest need usually gets bumped up.
In terms of rationing, it’s happening already, every day. Read what I wrote about ICUs. Yes, families want more aggresive care, but the hospitals cannot give ICU care to everyone. The sickest with the most potential to recover will get that care.