This is stated as biological fact when it's simply not. Sleep apnea doesn't change the laws of thermodynamics - if you are gaining weight you need to eat less or move more. It's not stigma, it's simply the way it is for the vast majority of people (the rest being covered by rare hormonal conditions that require a doctor to treat).
Being tired may cause you to eat more but being tired isn't making you gain weight, it's the overeating that is.
Being tired may cause you to eat more but being tired isn't making you gain weight, it's the overeating that is.