And it does depend, I grew up in California and felt lucky by the availability of fruits and veggies. I grew up in a poorer area and mostly everyone grew some of their own food.
I had heard of food deserts but didn't quite understand what that meant until I visited a friend in NYC. The grocery stores in her area had no fruits/veggies, none and there weren't that many grocery stores for the amount of people that lived in her area but there were sure plenty of fast food places to eat. I was a bit shocked as I had never seen that before. She said she had her fruits/veggies delivered because she had the money to do so. Also, most people lived in apartments and I didn't see a lot of balconies even so I don't think there was a lot of fruit/vegetable growing going on as well.
You can't out-exercise poor eating habits.