How I see it is that it's not that people own cars, it's that they drive them absolutely everywhere. I think there is a happy medium where you still have a car to get you places where you can't walk, but essential services are walking distance from where you live.

The apartment I moved into last year is in a neighborhood with grocery stores, some restaurants and a gym. It's not the epitome of walkability but it gets the job done. While at my old place I found myself getting into my car every day to go places, now I find myself only using it 1-2 times per week.

Also weather is a major factor. When I visited my friend in Florida last month I decided to walk to McDonalds one morning. By the time I got back I was drenched in sweat from the humidity. By comparison I make a similar length walk almost every morning and don't think anything of it. There even if the place was super walkable, folks would still drive because of the heat and humidity.