Because it makes sense of everything I know about ME/CFS both from my experience and from what other have told me about theirs, and all the research. If it hasn't worked for someone (and there are plenty of people it does not work for), that doesn't mean the problem is not limbic system impairment, it could mean many things: maybe their limbic system has damaged some part of their body so badly that it now needs more than brain retraining to repair itself (treatments to heal the gut, like I'm doing, liver repair, hormonal supplements, which I'm also doing, etc.).
To me this doesn't make any sense. It is pure pseudoscience as it has no scientific base. And I was like you for a while, I really believed in this stuff. I researched it for months and participated in FB groups where people practised this stuff. I even spent more than £2500 in "nutritional consultations", useless non FDA approved "tests" and supplements in order to treat a made up gut related condition.
Then I found a pharmaceutical drug that restored my health and I realised that my problem was 100% vascular in nature. It had nothing to do with the limbic system, the amygdala or the nervous system. Now my only problem left is cerebral vascular insufficiency which will likely be treated by angioplasty.
Maybe your nervous system has become so structurally damaged that you do need surgery, like a fusion or decompression (ala Jen Brea--she clearly was extreme enough to need surgery, but I do not think someone like me is, even though I have multiple structural problem in my spine/brain).
I'm sorry, but if you say that the overdrive is the root cause, to me this makes no sense on a physiological perspective. Jen Brea's problem was the instability of her C0 - C1 junction, resulting in compression of her brainstem. An "overdrive" (which by the way doesn't mean anything in medicine) of the limbic system or amygdala cannot possibly cause instability of the spine. If anything, is the other way around, meaning that the compression of the brainstem can cause malfunctioning of the organ. Sometimes intracranial hypertension can also cause the CSF liquid to compress some part of the brain as well, like the pituary gland that may flatten and result in hormonal inbalance. Both cases demonstrate that this "overdrive" is just a consequence in most cases, not a cause. Besides, Jen also had AAI which created compression of her jugular veins when rotating her head and likely eleveted intracranial pressure. This is a case of vascular insufficiency that can lead to hypoperfusion of the brain, then cerebral hypoxia and then brain inflammation, which has been well documented in ME/CFS research. Again, nothing to do with the limbic system or amygdala. Moreover, why would the limbic system be stuck if not structurally compromised? If it just got stuck on its own or due to stress, then people in war countries like Yemen or Syria should all get ME/CFS.
I am convinced that these "brain retraining programs" are actually just psycho-behavioural approaches, just a new and fancy CBT technique (and I've tried both of these approaches in my life). They are a "all in the head approach" that is packed in a fancy wrap and served to you with the marketing slogan "mind over matter". Because I'm convinced that the pseudoscience behind is just a marketing strategy to make you believe that you're not actually buying a psychological approach.
Of course, managing stress can help to manage symptoms. But it's still a coping strategy. For example, somebody with chronically high blood pressure will probably have a stroke if found in a particularly emotionally stressful situation. But what do you think is the cause of the stroke, the stress or the high blood pressure mixed with a blood clot? Another examples could be headaches: most headaches are vascular in nature, so if you control your blood pressure by stress management you can somehow control them. But still, the emotional stress remains the trigger, not the cause. The cause remains the likely cerebral vascular insufficiency.
I agree with
@Sarah94, you should say that you've found the cause of YOUR symptoms, not THE cause of ME/CFS, because for any positive testimonial (by the way, we don't know the medical history of these "recovered" people, we don't know anything about their health) there are hundreds of people that have tried these programs and failed. Instead, they just perpetuate the idea that ME/CFS is psychological among medical professionals (don't you find it fishy that most specialists from the curable app are psychologists?) and deny further funding into biomedical research.