Earlier quoted context omitted.
There is at least one case where your argument is clearly false: sleep apnea is often directly mechanically caused by bodyweight, causes health problems when untreated, and is strongly associated with being fat and/or muscular.
AFAIK sleep apnea isn't reversible by losing weigth (which doesn't mean that overweigth isn't at least one of the cause)
https://www.health.harvard.edu/blog/weight-loss-breathing-de...