I don't know where you're getting that info, but I just checked google maps for my city and it isn't true. There is one single Tesla supercharger location, outside a coffee shop in the parking lot of a Walmart. The nearest gas station is 1.8 miles by car, .4 miles walking (lots of one way streets).
I guess maybe my city is too small on a technicality? The 2020 census put us at 98k people, with 175k in the urban area.
The nearest big city has a population of 299k (metro 800k) and apparently has two total superchargers near gas stations, though one is literally on the city line, so whoever is making that claim is operating entirely in lawyer speak and not how most people would understand that claim.