That's because facts aren't politically correct. And there's another layer to your opinion. It's necessary to lack self-control and discipline to get fat in the first place, but after that you may stay fat for many months despite exercising and dieting (unless the diet is extreme), because high levels of cortisol and insulin block the body from accessing stored fat. With high enough insulin levels it's possible to lose muscles instead of fat.

I had to go on a diet consisting solely of chicken breasts, fish and broccoli for two weeks to start burning fat body fat. If it weren't for a hepatologist who told me to stop caring about how many calories I eat, but instead focus on lowering insulin as much as possible, I'd probably still be fat, despite cycling for 30-50 minutes every day at that time.