Self-control is, ironically, not usually within one’s self control.
Most people don’t contemplate very deeply about the gap between their will and their behavior. I’m extremely focused on self-determination and it’s absolutely astounding (and irritating) to me how little control I have over my actions relative to the control that circumstances have over me.
Your attitude about the matter is common, and seems like plain old common sense. It’s also dead wrong.
Problem solved. Next!
Most people vastly overestimate how much they are actually in charge of their life.