I do agree with this. Some people might thinking that self control is about resisting temptation but it's mental draining. Rather than relying on your willpower to resist something, doing environmental control does more benefit. Why do I have to resist to eat an ice cream if there's no ice cream in my fridge. Why do I put so much willpower to not snacking if there's no snack on the table.

Self-control is not about resisting (it's too passive/reactive), it's about controlling/managing ( being active) yourself to achieve some goals that you have set more efficiently.