[Falkon1313]

Except if like a great many in the U.S., your only source of nearby groceries within reasonable walking distance is a gas station. In that case a bag of Doritos is $40+ cheaper than hiring a cab to take you to the grocery store and back for a bag of beans and rice. Also saves you a couple of hours of travel and cooking.

When I was younger even though I lived on a major street downtown in a city, there were no grocery stores around. Plenty of fast food restaurants with $1 menus though. Cheap, quick, and easy, but not all that healthy. Actual grocery shopping was a once or twice a month thing - bus ride out to the store in the strip mall, cab ride back, 2+ hours total and a lot of money.

One of the things I love about my house now is that there's a full grocery store right at the end of the street (along with other stores and a restaurant a block over). But most people don't have that.