Why would you buy groceries every day? Usually, where I live, people who need more than a backpack of groceries have a small rolling bag, with enough space to f

Why would you buy groceries every day? Usually, where I live, people who need more than a backpack of groceries have a small rolling bag, with enough space to fit a week's worth of groceries for a family of 3-4. I buy groceries for a week for 2 people on a large backpack. Public transit is just great overall, being able to walk to get basic day-to-day needs is pretty sweet as well. I seriously do not understand this argument, and I've lived in Brazil, USA, and Sweden, it's simply a non-issue when mass transit is dependable, well-connected, and available.