Exactly. Few people understand what their calorie budget is and have no way to relate their intact decisions to that budget. Losing weight is simple: eat less than what your body needs to maintain itself. In doing so your body will pull from the energy reserves that it has (fat and muscle) to make up the difference.
Knowing what to do and doing it are very different things. It took a major macronutrient shift after at least a year of trying to diet and failing before I finally got on my way to losing weight.
I knew I was done for the day, but boredom, stress, and hunger made it only a matter of time before I would crack. A week of eating well, then cracking and eating anything I could get my hands on, then repeat.