Well, you are right. My BMI is off the charts,but not because I don't go to the gym,but because I overeat in the evening. There's no exercise on the planet that can offset multiple trips to the fridge before you go to bed. And the reason why people overeat is different for everyone: lack of sleep, stress, anxiety, boredom, poor nutritional choices and so on. So it's crucial people fix this part if they really want to change how they look and feel about their body, because otherwise you sign up to the gym and quit 3 months later, because there's no progress at all.