Unfortunately, for those who are obese no amount of diet or exercise will give them the "perfect" body.

I see many who were overweight lose weight and get ripped, while others have no chance to reach that far. Someone with a BMI of 40 has basically ruined their body and while they may look better with a shirt, they will keep it on while on the beach because of the excessive skin.

The reward and motivation for a person with a few pounds extra and a truly obese person are simply too different. Someone who has not reached whatever weight threshold that fits their body type has a chance to look "normal", while the more obese person will reach a point where losing more weight has less impact even after plastic surgery.