I don't know anybody with body fat of 10% or less who has a waist greater than 40 inches. LOL. My waist is the same now as it was in college, about 32 to 34 inches depending on whether I'm currently in a bulking or shredding period.
Yes, obviously. You are trying to compare your experience without metabolic syndrome to the experience of a person with metabolic syndrome. Any person without metabolic syndrome retains the capability of burning fats when exercising, and any person with metabolic syndrome has their ability to burn fats from the adipose tissues blocked by the hormonal triggers activated by excessive insulin levels. Insulin causes fat retention. People with extreme cases of metabolic syndrome can literally starve to death with the atrophy of the muscles in the limbs, buttocks, heart, and so forth while still gaining weight and girth in the waist in the adipose tissues. This is all due to the malfunctioning metabolism scavenging every calorie that it can from the stores of dietary and muscular glucose, hepatic glycogens, and finally the breakdown of proteins in muscular tissues while rejecting practically all efforts to breakdown the triglycerides in the stores of fat in the body and bloodstream. You really do need to study at lest some of these videos and gain an understanding of how metabolic syndrome and diabetes affects the ability to burn body fats.
I will check out the videos