This is factually wrong, because the relevant year is 1930. However, even if the meme had 1930, it would have been misleading. New York surpassed half a million by 1850. This means that by that point is was already too densely populated for people to grow their own foods. They must have bought it at a store, even if it wasn’t a supermarket.
I think that Joel Salatin’s issue isn’t with supermarkets, but with preservatives and long range food delivery. But meat has been sent long distances in the US at least since the civil war. Food canned in factories also has a longer history.