I doubt anyone is lying, why would they?
I wasn’t morbidly obese, my bmi was 32 and I wast obese long, just a few years, and I worked out, did strength training, ate my protein and moisturised all over daily, so effectively massaging my skin, lost weight at about 1.5 lbs a week, and did this throughout the weight loss phase, and I genuinely have none.
i did have crepey skin on my arms and on my stomach if i twisted, and some loose skin under my backside, when i hit goal, but within six months of hitting goal and keeping up with my regime, it all tightened up. I’m in my fifties.
so I can well beleive some people whose bmi was 40 have achieved the same thing, if I was two or three stone heavier ans into morbid obesity,I assume it would be the same, it really depends on genetics, how you lost the weight, how long you were fat, how much you did exercise, did you protect your muscle as much as possible and what weight you have at goal. Mine is 20, that’s what I’ve been for several months, and genuinely I have none.
Others will have a lot of loose skin, and for the exact same reasons, genetics, how long they were obese, how they lost the weight, did they protect their muscle, there is no one answer, it simply isn’t a given you will have a lot of loose skin if your bmi was 40 which seems to be what you’re assuming.
if you’ve been morbidly obese for a long time, loose weight too rapidly, don’t do strength training, don’t eat your protein, doesn’t matter if your BMI is 3o or 40 at the start, you’re likely going to have a lot of loose skin.
once your bmi goes above 40, say 50, then I think it is more difficult, and loose skin is odds on.