The cost is incredibly high and, if it becomes a bridge to nowhere, that incredibly high cost is paying for a terrible quality of life that will only get worse.
One of the patients in the story was a 17 year old with cystic fibrosis. Iirc, CF accounts for a third of all adult lung transplants in the US and half of all pediatric lung transplants in the US.
One drug for CF costs $250k to $300k annually. Patients who get a transplant go through around a million dollars worth of medical care in the year of the transplant. Following transplant, they have to add antirejection meds to their typically long list of other drugs.
Some years ago, some estimates put the treatment for CF at $100k to $250k annually. Some members of CF discussion groups would then wonder out loud "Where did they get these figures? They sound crazy low."
At the time, life expectancy for CF was 36 years old.
Around that time, one mom said "My child with CF just turned 18. When they were born, life expectancy for CF was 18. Now, it's 36."
People who get transplants can also go into rejection, which sound like a pretty gruesome death from what I have read.
The ethics of who get these kinds of treatments is really complicated. It does everyone a disservice to view it through rose tinted glasses. It's just not that simple.