I was diagnosed with "atypical cystic fibrosis", which is a relatively mild form of CF. I made a lot of dietary and lifestyle changes. CF involves a miscoded protein called the CFTR. The protein handles trafficking of certain molecules into and out of the cell, one of which is sodium chloride (salt). The misprocessing of salt is such a well known trait that a "sweat chloride" test is the most common test for the condition, yet doctors hardly address it at all. I found that consuming a good quality sea salt high in brine (a mixture or other minerals) and the right fats and carbs so it absorbs properly can reverse a lot of my symptoms. CF also generally encourages the body to be extremely acidic. I found that addressing PH balance and correcting it back to normal also does a lot to reverse symptoms. My reading has indicated that both of these factors -- PH balance and salt/mineral balance -- being extremely out of whack inside the cell will promote misfolding of proteins. This suggested to me that if you can address those issues, you can get the body to produce more functioning CFTRs and thereby get the body to function closer to normal. And, in fact, my son and I do function a lot closer to normal as long as we stay on top of the PH balance and get adequate amounts of good quality sea salt. We also engage in a lot of practices to reduce exposure to microbes, toxins, etc.
For me, it is more complicated than that because I was so very sick, so I had to address a lot of complicated infections and stuff. But my son had not been on antibiotics for over three years prior to being diagnosed, so it is clear to me that the right kind of support from an early age can drastically reduce the issues this disorder causes (at least in most cases -- in some cases, the CFTR is completely missing and I assume that would be different). Most medical intervention is focused on drugs and surgeries and vaccines. There is very little nutritional information available. Most research seems to be drug studies and the standard wisdom doled out by CF doctors is to eat great quantities of junk food because it is high calorie, high fat, and high salt. A "high calorie, high fat, and high salt" diet is the current state of the art advice for people with this disorder and I think it does a lot of harm. Instead, I went for aggressive nutrition to reverse a lifetime of nutritional deficiencies and began getting healthier and getting off all the drugs.
It's complicated and playing around with these ideas when you have no idea what you are doing can cause problems, so I understand why it goes over so badly with other people. A more information dense means to safely convey how this works looks to me like the only means to get more people to adopt this approach.