Remember, significant weight loss is as difficult to manage as heroin addiction. Sometimes I think it is more difficult. If your doctor does not know this, he is not current in his weight loss education and needs some study. If your doctor thinks will power and self-discipline are the two most important factors in losing weight then I suggest that you take his advice about everything else but not about losing weight. Do some research in your area and find out which doctors know about weight loss and which doctors can listen and treat you with compassion.
Compassion is more important than knowledge about weight when it comes to good doctoring.
Heck, even if it's your physician. Above all, remember that you are not a child when you go to the doctor. If you act like a child, you will encourage him to act like a parent. Too often he will become a critical parent when he feels frustrated in his attempts to help you. This will produce the behavior that you dislike.