That honestly doesn't fit with my understanding of how life, the universe and everything works. I did some searching and this source says that 85 percent of people with CF have at least one F508del mutation:
https://pediatricsnationwide.org/2019/11/25/a-major-mileston...
And this source agrees with your statement:
The triple therapy, known as Trikafta, could effectively treat 90% of people with cystic fibrosis.
https://pediatricsnationwide.org/2019/11/25/a-major-mileston...
When I was on CF lists, I was hearing that the first drug in this class that had recently come out only helped five percent of people with CF (I was specifically hearing that it helped people who were double F508del and that was only five percent of all CF patients, IIRC) at a cost of at least $250k annually, so "if you can afford it or live in a country that covers that for you."
I was also hearing people say that some of the stats were dummied up and exaggerated because so much money was at stake.
I left all the CF lists years ago. The figures I'm seeing today don't fit with what's in my head and I don't know how to sort out what's true and what's PR nonsense and it doesn't really matter to me personally. I and my son with CF are both off all drugs and have lived on very little money for years.
Good for them. I'm sure this makes me even more irrelevant, "crazy" and stupid in the eyes of the world than I was already. Which is no big deal. I don't really care. I'm just leaving this comment because I asked you for a citation and then found my own and deleted my comment.
I don't want people to think I'm being a weasel or anything. The articles I'm finding seem to agree with you. I don't know what to make of that and it's not really relevant to my life. I will never have the money for these drugs and don't really care.
Have a good day.