I’d like to think that many (maybe even most) people would choose as your son has but I’m very concerned that the choice may be taken from him. National Health Care could say “do this or we’ll cut you off completely.” Give up your soul or give up your life.
A large enough group of people could stop this now by forswearing the product of this research. Reasonable research could continue along the lines discussed by George Bush: pre-existing lines and adult stems cells only.
I pray that your son gets a transplant soon.