I mean, in medicine most "fixes" for harsh problems are temporary; nothing is permanent as in the end we all are going to die sooner or later. There's a good reason to think not in terms of "people cured" but in metrics like QALY (quality-adjusted life years) gained - even if this transplant fails tomorrow, it has given that poor woman 5 years of significantly improved (according to her own experience) life quality, and that was a good and valuable thing to achieve even if it turns out that it can't last.