Second of all, I believe everyone should commit to every organ in their body for the whole ride of life. No organ left behind, the soul isn't just the heart or brain, it's every organ. And if you have to lose an organ, live with it, that's part of why so many organs come in pairs.
Sure doctors tell you how cool they were when they transplanted a heart for the first time, but what are the outcomes like for the patient, like really? Warfarin? Immune suppression and therefore all kinds of warts and other parasites? Doctors make it sound like you "need" a new organ, but really it's the surgeon who needs to perform a surgery to keep being a surgeon. It absolutely is not like swapping in a brand new power supply for your computer.