Skeptism VS resistance
These two factors are very critical in your weight loss effort.
Skeptism is OK to be skeptical in most cases this is a healthy reaction and resistance and inflexibility will interfere with your success in different parts of your life.

Honestly, I can tell you change is very scary. You have to be ready for the consequences, as well as not be afraid of success.
What is truthful about change? If I tell you that if you change your behavior, you will win $100,000, you would willingly change your behavior immediately for two reasons. Because the idea of $100,000 appeals to your emotions and you can simply purchase a lotto ticket and prove it you may be skeptical about it but you will give it a try. However, when I tell you that you will lose weight several things will go through your mind. That statement is not an emotional trigger to your brain, so immediately you develop resistance toward it. Then, subconsciously, you would be wondering about any alcohol or chocolate restrictions. You may feel perhaps that I am lying to you. Other personal issues will interfere with your decision and behavioral changes, and subconsciously you will resist. That is why I encourage you to use hypnosis or mental imagery to change your behavior and motivate yourself to create long lasting results.