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Unless you operate your own farm, sooner or later you need to eat, and that implies you're buying food from somewhere.

> "Real-life shopping" is just as optional as online shopping is.

Really? And how do you get your food if you don't go shopping? Most people can't run a self-sufficient farm.

Gotta eat. Some kind of shopping is essentially non-optional unless you grow all your food.

And using cash isn’t opting out of real-life shopping, it’s just opting out of one payment method.

Even if you grew all your own food, there’s plenty of other things you will need.