From the science point of view...Low carb is not the best for everyone...No, absolutely not...
Many people need to be on the low fat diet because their lipid profile (blood cholesterol and triacylglycerides) goes up with addition of cholesterol (only found in animal products) or saturated fat. Therefore, there is not one solution for everyone. If it were that easy, we would have been figured that out years ago
Everyone has different genes that create infinite possibilities for differences. Some people do well on the low carb diets, others don't.
Therefore..you can try and see what works, and please work with your doctor and/or a Registered Dietitian...a professional. Most other folks that are promising you an easy way out are out to separate you from your money.