My local Walmart isn't my favorite store in the world to go to for fresh produce and meat. The selection and quality are generally inferior to a couple of local regular supermarkets. But I could absolutely shop for food there that isn't all highly processed.
The thing is that, as you suggest, the pre-packaged deli section is bigger than the unprocessed meat section. And then there's the soda aisle, the chip aisle, etc. Shelf space is hugely tilted toward "junk" and other highly processed food.
My regular supermarkets have lots of processed food too of course. (And nothing wrong with a lot of that in moderation.) But it's far less skewed than in the case of Walmart.
The thing is that, as you suggest, the pre-packaged deli section is bigger than the unprocessed meat section. And then there's the soda aisle, the chip aisle, etc. Shelf space is hugely tilted toward "junk" and other highly processed food.
My regular supermarkets have lots of processed food too of course. (And nothing wrong with a lot of that in moderation.) But it's far less skewed than in the case of Walmart.