I am SOOOOOOO not a doctor, but for maybe five to seven years, until last year, I had a slightly similar issue with asthma-like symptoms: occasional wheezy coughing when I was stressed or really tired, that sounded to me a lot like what asthma sufferers have. Meds didn’t help.
At the time (most recently Jan '22) I was also about 55 pounds over what I consider the best weight for my body type and activity preferences. I am now about 15 pounds over that weight, but the remarkable thing is that as soon as I started mild undereating instead of overeating and concentrated on healthier foods, the asthma-like symptoms disappeared almost IMMEDIATELY. Like, I doubt I had even lost the first five pounds when I noticed that hey, no more wheezing! And I haven’t had another wheezy-cough episode since, except once or twice over the intervening months when I’ve deliberately gone AWOL on my health improvement plans and stuffed myself with rich foods (which I do not regret in the slightest, btw).
Curious about this, my ignorant non-doctor ass went looking for advice from Dr. Google, who spouted a bunch of confusing yabberyabber about something called “GERD asthma” (that’s gastroesophageal reflex disease, sez Dr. Google). Liiiiike, you can have acid reflux without noticeable heartburn pain or acidity? And the acid reflux can make your lung airways more sensitive to irritants and/or your nerve reflex tries to close off the stomach and it constricts your airways or something, did I mention I’m not a doctor??
So, my intensely medically ignorant ass MAY be a clinical instance of serendipitously fixing GERD asthma episodes by decreasing bodyfat (or just by changing eating habits, since as I said the wheezing disappearance was much quicker than the actual bodyfat loss). But, in case you didn’t know, I’m not a doctor, and even if I were, there’s nothing that says that my experiences would be in any way relevant to anybody else’s.
(And BTW I am 1000% in agreement with you about the pitfalls and unreliability of actual-use weight-loss practices, and the hazards and counterproductivity of very, very much of diet culture and the diet industry. Fat acceptance and body positivity about all body types are DESPERATELY, fundamentally necessary to improve public health and fitness. The more we scold and shame people, including ourselves, about our size or condition, the worse our health will get.)