I considered trying one of these but I realized I'm not going to get all my at-home meals (or any drinks, snacks, paper towels, etc.) from them. Which means I'm

I considered trying one of these but I realized I'm not going to get all my at-home meals (or any drinks, snacks, paper towels, etc.) from them. Which means I'm still making a weekly trip to the grocery store. So where's the convenience?