it's called "Planned obsolesence". Look it up, it's a very solid, and mostly raped viewpoint in manufacturing. Anyone ele ever watch Chris Rock? Every see any of his classic stand up shows? He hit it right on the head with "Theres no money in the cure, the money is to treat it". That is 100% correct. If you honestly think that the pharmaceutical companies/research companies (which are extensions of the pharmaceutical companies) truely want to outright cure ANYTHING because it's a nice thing to do for the human race, well, you are either very young, or very naeve, or quite possibly mentally defective. While all the researchers have an altruistic intent of "curing" a disease with their newest findings, those findings will always be turned around into "what drug can we market to help treat the symptoms", type approach.
Taking another line from Chris Rock, What was the last actual disease that we "cured"? Polio? If a particular researcher says "Holy crap, I found out that X might possibly cure CF!!!", their bosses get their information, take their applications, and then find a way to use that data for a way to apply it to treat the horrible symptoms of CF, but not actually use it for the reasoning of curing CF. Even though CF is still very rare in the general populace, it is still in the corporations best interests to offer new "advances" to treat our symptoms, and not a "cure".
Ask yourself this. Just from the cf foundation, who is sponsoring these new CF "drug" trials? Who stands the most to benefit from these trials? If their new drug shows signs of potentially treating CF patients, do you think they will go a step further to understand why it treats and helps our symptoms, or will they continue to try and do patient trials to further new drugs, which means more profit, which means more CEO's drive nice swanky cars...
Sorry life isn't even remotely important to the big pharmaceutical companies. It's all about what is marketable, and what shows any form of promise for profit potential. While the CF foundation is a wonderful organization, they can only go on what research other large corporations are willing to invest in, and that investment, is exactly that, an INVESTMENT. New drugs will come out, our Doctors (who are in general very deeply embedded with the pharmaceutical companies) will recommend new drugs for us to treat our SYMPTOMS, and we will continue to languish, and have our live spans lengthened, but not "cured".
Remember guys, even if the entire human genome was mapped, and cystic fibrosis only killed rich white republicans, it wouldn't warrant any true form of authoritarian initiative. Ya know why? Theres no real money involved with saving anyone disease wise. The only real financial opportunity exists with share holders, and profit margins. Of course I could totally be wrong in this assessment, but if you don't understand and don't grasp the basis which is human sinister being, then you're wrong.