Baloney!
I was diagnosed with it in my early 40’s, I had a bad bicycle wreck and shattered my elbow. I was not obese..I had been sleeping BADLY for years and it was wearing me down. During the elbow operation they realized I had sleep apnea BAD. Also some insomnia....
I had been very active riding bikes 3000 miles a year for quite awhile and other athletic things...and was in pretty decent shape.
I know I would have been dead by now without it, if I even nap without it I wake up feeling worse, punchy and hung over, sometimes with a bad headache that won’t go away.... The lack of sleep over the years has messed up my short term memory some as well.
I wear it all night every night, don’t really like it.. but its necessary for me, and helps.