The problem with never grocery shopping is twofold. For one, it means that you're eating take-out for every meal and, in your wake, leaving a trail of Taco Bell value menu remnants. We're not uptight or anything, but that half eaten Beefy 5-Layer has been on the coffee table all weekend, and there's a colony of carpenter ants nesting in the reduced-fat sour cream. You're disgusting.
Second, if your trip down-the-block to Chipotle proves exhaustive (and it often will), you'll "make do" with what's around the house, which is nothing. Wolfing down cheap food that belongs to someone else is pretty pathetic. Walk to Trader Joe's with ten dollars, and you'll walk out with a truck bed worth of fresh produce. Everyone wins.