Growing up in the UK my family used to drive 15-20 mins to the supermarket and do a big weekly or monthly shop. The nearest _decent_ non-petrol-station style shop with actual food would have been an hours' walk.
In the US unless you actually live in the absolute middle of nowhere like rural rural you're not more than 20 miles from a supermarket. Map example - everywhere other than the darkest red colour is a 15-20 min drive:
https://imgur.com/distance-to-nearest-large-supermarket-usa-...
Basically almost anywhere that has any meaningful population at all you're sub 20 mins drive. Of course there's not much in rural areas, that's what rural means.
There seems to be a focus on whether you "need" a car which has always seemed silly to me. If you don't have a car in the USA, outside of somewhere like NYC or specific metro corridors, you are going to have a significantly limited life in so many ways that having to drive to the supermarket just seems like a triviality in comparison.
Even in Britain people just like, have cars, it's normal, if you don't then outside of London it's just kind of embarrassing.
The whole thing seems like someone just wants an excuse to be provocative, just like, go to the supermarket, it's not that deep.