Learn to make better choices. It can be done. Throw out the crap in your pantry and fridge. Cook with whole food based ingredients. Nearly everyone can eat to their hearts content, within reason, if those calories are not coming from processed foods.Majority of people get fat or can't stop eating not because they choose to but because they have underlying problems.
But in your world free of complexities, eating disorders are simply fixed by eating less, drug addiction is easy to overcome if you only choose to and depression is cured with a gym membership.
If everything was a choice, why would anyone choose to be addicted, poor or fat?
Serious question.
I agree that once you open up a bag of chips or oreos it's hard to stop, but try to remember how it ended up in your hands, and soon after your mouth, in the first place- because you bought it.