I love living in one of the most walkable cities in the USA: San Francisco. I have lived here for 53 years and have never owned a car. Yes, it's possible to get most of what I need within a 15-minute walk, though I do have a much wider walking radius than that.

Check out the website https://www.walkscore.com/, enter your home address, and you can see how walkable your own neighborhood is. You can get scores for walking, public transport, and bicycles.