In economics we distinguish between naive and sophisticated agents. The naive agent assumes he can continue to maintain self control. However, we want our futur

In economics we distinguish between naive and sophisticated agents. The naive agent assumes he can continue to maintain self control. However, we want our future selves to make a different set of choices than our future selves often want to make. So, the sophisticated agent recognizes brute self control does not always work and finds ways to commit himself. Most of us are familiar with ways of doing this: - Plan food for the week and don't keep unhealthy things in the house - Get a gym partner to avoid excuses for skipping workouts - Make a budget to place artificial limits on impulse spending If I were a serviceman and knew I was going to places with lots of drugs, and that I had a weakness, I would maybe ask my CO to test me every x days while there. Commit in advance to a course of action that maybe in the future I would not like, but the choice is already made and so I am better off. This is only one possible idea, of course there are others, the point is there are ways to mitigate these problems. There are ways we can work against our future selves to make better choices and doing this is an important part of being an adult. The fact that everybody is not perfect at it does not mean people don't have agency. And an idea of "self control fatigue" does not excuse people from responsibility for the consequences of their actions or failure to succeed.