I don't have a horse in this race, but from my personal experience eating satiating whole foods with lower glycemic index, higher fiber and protein content makes it very difficult to gain excessive weight.
On the asthma front, from experiences with someone close to me -- getting in great physical shape (with caveats regarding training) DID indeed help greatly with broncho-constriction and higher scores on FEV. Basically symptoms and inhaler use went down tremendously over a few years and a physical transformation.
Before GLP-1s, there was rarely any such thing as "satiation" for me. Getting full was something that happened without the feeling of having had enough. The main effect of wegovy, for me, was having a feeling of not needing to eat rather than just feeling too full to eat. It was quite an experience, and one I am not sure I had had in more than 30 years.
I find for me that doesn't work. I have to actively count calories to lose or maintain a healthy BMI range. If I don't, no matter what I eat, I end up stabilizing in the overweight category. I'm lucky enough that my wife has a very flexible work schedule where she is able to cook most meals for us, but she hates weighing everything out so I can track... we've tried to stop the tracking multiple times but it never works. I'll think I'm eating to the same satiety level as before, but I end up slowly creeping back up in weight. My wife is fine either with or without tracking for maintaining her weight, though she does also seem to have an easier time losing when she's counting her calories. I think this is why it's so hard to have discussions about it, people's experiences literally don't match even when they try the same things. I suspect I'd be one of those people that if they tried Ozempic would be able to lose tons of weight, and who would shoot back up as soon as they stopped, unless I track the whole time... at which point I wouldn't need the Ozempic in the first place
On the asthma front, from experiences with someone close to me -- getting in great physical shape (with caveats regarding training) DID indeed help greatly with broncho-constriction and higher scores on FEV. Basically symptoms and inhaler use went down tremendously over a few years and a physical transformation.