Drugs should be considered a last resort for the morbidly obese who have already tried everything else without success and who will face serious health consequences if they don't lose weight. Unfortunately, if you're an endomorph, Cohen is right. Losing weight is definitely easier for some people than for others and that doesn't seem fair. But that's the way life is. Life isn't fair.
Obesity is the result of many influences.
Genetics is only one of them. Like it or not, the primary cause of obesity is your own behavior. Most of the factors that affect body composition are entirely under your control. These factors include how much you eat, what you eat, when you eat, what type of exercise you do, how frequently you exercise, how long you exercise and how hard you exercise. If you have the genetic predisposition towards obesity, you can lose fat like everyone else, you're just going to have to work harder and longer at it than other people.