My mom was on kidney transplant lists for a couple of years. Her blood type hampered the efforts as it was simply tough to find a match, but she did what she was instructed to do. Took her meds, watched her diet & activity, kept up with dialysis, followed medical guidance, etc. She eventually got matched with a donor, but it didn't work out, the kidneys failed, and so she endured 4 surgeries within 4 days (the kidney transplant, 2 lesser procedures, and then the eventual kidney removal) and then went back to the list. She never had another opportunity.
If folks on transplant lists don't want to follow the protocols, that's fine. Simply bypass them and move on to the next person that's willing and able.