Not the best example IMO. San Jose is quite urban, and that point on your map is just 2.4 km from Pruneyard Plaza shopping center with its Trader Joes. From various European urban contexts I have lived in, I personally would consider that walking distance. Of course I understand that in the US, where any distance over 250 m involves getting in the car, it wouldn’t be. And also, American street grids tend to have more intersections with waits, so it takes longer to walk short distances.

So I clicked your link, clicked "search nearby" and plugged in grocery store. From the pin point at your link, there is a Safeway and a Grocery Outlet both within 1 mile of the pin, and there appear to be sidewalks heading to both. 1 mile is definitely something I'd consider "walking distance" (I used to walk that distance to school every day). If you're willing to walk 2 miles, you can get to both a Target and a Home Depot and again as near as I can see, sidewalks the whole way. There's a post office 3/4 of a mile away, 2 elementary schools within a mile and 2 high schools within a 1.5 miles. 2 parks within about a half a mile and and international food market within 1.5 miles.

If you want a walkable / bikeable neighborhood you could certainly do a lot worse than this random suburb in California.