Ohh very touchy subject!!
Okay, I'm going to come from the other side of things. We only know part of this story.
The transplant process is a very big one, and it's not as simple as getting new organs, be it a new kidney, heart, or a set of lungs.
When the patient is told they will need a transplant, there is a fare bit of testing to go through - blood tests, 24hr urine tests, etc.
Then there is the mental testing to see if you will be mentally stable to go on the list. As I said before, it's not just magically getting new organs and all is okay - it's far from it! You need to be mentally prepared for the work that goes on before, during the healing process, and after txplant.
Before hand, you have to face the reality that you could die while waiting on the list. Now, for a 3yr old, that wouldn't really come into play, as they wouldn't know much difference (sorry if that sounded harsh).
During the lead up, there will be more testing, there will be blood tests every month, and she will gradually get sicker, so that means lots of medical treatment, though I doubt that would matter since she would be having treatment with her condition anyway.
After transplant on the other hand is where it will get difficult. Even if one of her family members do match perfectly and can give her a kidney, the amount of anti-rejection medication and physiotherapy she will need during healing is heaps!!
I have been told, for a lung transplant, I can expect to be taking no less than 30 tablets each day. 30!! Now, it's hard enough to get kids to eat their vegetables, let alone take something that they don't realise is going to keep them alive!! Trust me, my parents know that first hand!
To be able to get someone who is 'mentally retarded' to understand that they need to take that medication so they can live a long happy life would only be part of the challenge.
No one can guarentee that these organs will take to her body & that she will live a happy life. She could end up in more pain from the transplant, she could die in 6 months time anyway because of rejection. Transplant is no magical cure.
Even if she ends up on the txplant list because none of her family members match her blood/tissue type, with her condition, no doubt she wont be near the top of the waiting list. I can see where the parents are coming from, but I can see where the doctors are coming from more. If they can save another person's life, who they know will look after themselves & not damage/ruin this gift of life, I know which patient I would be choosing.
I can say all this because I am waiting for new organs too.
For the little girls sake, I would rather her live this happy little life she has at the moment, then have to go through all the pain in the world, not understanding what is going on, only just to pass away because the txplant did not work...