Absolute bollocks. Saying weight gain or difficulty with losing weight is genetic is (for the vast majority of people) a coping mechanism for lack of willpower.
If you're arguing that weight gain or a sense of willpower are entirely genetic, I think the onus is on you to provide proof.
Introducing the likening of weight loss, something that everybody is capable of, to changing skin colour and changing your gender/sex is absurd.
Eating below your energy expenditure will cause you to lose weight. Every time somebody decides to eat a (or many) burger or a donut, they have the choice not to do that. Genetics aren't forcing anyone.
