That may be the case in your location, but you can go look at zonening maps and its not the case. Many city have 80 or sometimes 90% of R1 zoning where no grocery stores are allowed.

And it also shows up in data showing how many less then 5mile trips are maybe by car in the US and grocery shopping is one of the major drivers of such trips.

Living in several areas of US suburbia as well, I was nearing my 30s before I lived in a place with grocery stores that I could even bike to, let alone walk. My quality of life increased drastically when I was finally able to walk/bike to the store. Walkable suburbia exists in the US, but it’s not the norm. Don’t take it for granted :)

> Living in several areas of US suburbia as well, I was nearing my 30s before I lived in a place with grocery stores that I could even bike to, let alone walk.

I read this a lot so I believe it, but haven't really experienced it. I've lived in a couple places on the east coast and multiple places in California and only once there hasn't been one or more supermarkets within walking distance. And that one place was quite rural so it was not comparable to any suburbs.