The main reasons for not counting the calories

Counting calories became like a diet and is a method.

And if you want to lose weight you don't need a method, you need to learn the basics, you need something that becomes part of your life without knowing that is there.

And became a calculator and thinking all day long about how many numbers you ate and how many numbers you got out or scanning with your phone labels and writing down the numbers of the quantities you ate, don't forget every time to wear the watch or bracelet that tracks the movement, etc. It is not the way to become part of your daily routine without any other stress involved. 

Doing an action that becomes stressful, becomes noticed, by becoming noticed you start becoming aware of it and the way the brain and our body work is to save energy not to consume.

When you become aware of the action the brain receives signals that there is an activity that consumes energy and is not a priority and over there the demotivation starts and sooner or later you will give up on losing weight and becoming a better, stronger person