CICO is a great model for 3rd parties in your diet. If you have someone watching your dietary intake, they can count calories for you and you will succeed at losing weight nearly 100% of the time if they can monitor everything you eat. Most individuals cannot count calories even reasonably close to what they are consuming due to a number of factors.
The model is also an abject failure when it comes to the individual psychology of overeating. This is where people like the above doctor says it's "just wrong". CICO as the only method of weight loss is about as effective as quitting smoking cold turkey (3 to 5% success rate). In general getting people to stop eating high caloric density / high glycemic index foods and replacing them with something else is a good starting point. You're effectively lowering the CI but not requiring a cutoff point for the individual.
The model is also an abject failure when it comes to the individual psychology of overeating. This is where people like the above doctor says it's "just wrong". CICO as the only method of weight loss is about as effective as quitting smoking cold turkey (3 to 5% success rate). In general getting people to stop eating high caloric density / high glycemic index foods and replacing them with something else is a good starting point. You're effectively lowering the CI but not requiring a cutoff point for the individual.