WalMart’s profits are mostly in the cheap, plastic, Chinese stuff, IMHO.
In my town they built a Walmart between Newark and Jersey City, and it is packed all the time - with a lot of the sales related to groceries. Their prices for those items are noticeably lower than regular supermarkets, but I don’t go because it is a zoo. It is fine early in the morning, but is Third Worldish once the permanent underclass wakes up - and cops are there constantly dealing with shoplifters.