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.
Until then, it's clear that you have no useful experience on the subject.
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.