Obesity, skiny, tall, short, unibrow, hairy, flat figure

[A-Man]

But majority of people that blame genetics don't have a genetic problem.

Even though. As long as this minority exist- as long as there is the slightest chance one is telling the truth, you lose the right to call him a liar without a base that proves, beyond certainty, that he's lying. Same goes with every judgement you make to anything in life.

Also I stick with "you can't be genetically born fat"
You just have genetic dispositions that make it easier to be fat / harder to lose weight

I know someone who was born, and till this very day is, as rotund as a ball. I am not saying this to disprove your idea of it. But I trust genes play a big role in that, especially that his parent and most of the people in their stem, are very overweight too.