If you are an alcoholic, would not having 24 beers in your fridge lower your willpower? I think it is the reverse, just like this. Not in house = fight won, so you have more willpower left for when you DO need to fight a fight (say, friend offers a beer after work).

Self control takes willpower. Willpower is a finite resource (you can find studies on it. This is why after a hard day of work you are more likely to say screw it and eat an extra cookie). You just saved having to use a little bit of willpower each day. Which means you will have MORE willpower to spend on other things, not less.