It's also not true. Carrefour and Auchan stores in France can be the same size as the big Walmart stores in the US.
I agree.
In addition, food quality is miles ahead
No it's not. Plus the selection in American grocery stores is far superior.
Right, which is why I said average. Average American grocery stores are nearby and sell a gigantic amount of food. And the quality is exactly the same or better.
Because it's ease of access to a large variety of inexpensive food.