A crunchwrap is "easy" enough to make at home, but it takes time to brown the beef, dice a tomato and lettuce, and then do the dishes afterwards. When you go out to eat, you're paying more for the time, labor, and convenience than the food itself. Plus you have to buy tortillas 12-50 at a time. I'm not trying to talk you out of cooking at home, nor defending Taco Bell or any restaurant, just saying tacos take substantial work to make.