You should at least admit that this is an American problem. No-one in my family has a driver's license and it's not an issue whatsoever. There's very little reason to own a car in a society with a functioning public transport system.
Often times in HN you get the impression like americans are the only ones using cars to get around, but at least where I live (Finland) families generally own at least one car even if good public transportation is available. In 2021, 89% of adult men and 76% of women had a drivers license and I would say that commuting to work with a car is more common than with public transport. Despite having decent public transportation, it is just seen more convenient to use the car.
Going to a grocery store a few times a week is not a lot of effort. Urban grocery stores are nearby, they are optimized for quick visits, and you can often buy groceries when returning from somewhere else.
You should have emergency food at home, but many kinds of fresh foods are best eaten within a day or two. If you only go to a grocery store once a week, the quality of the food you eat is worse.
In bags, duh.
(Or a backpack.)