Buts Dollar stores are growing fast. That won't be true for long.
I wonder at the "make their own meals". Maybe from packets or reheating frozen stuff. But the meat counter sure isn't the largest section in the grocery store, not by a large margin.
At all of the American grocery stores I've been to, the unfrozen meat section is as large as the entire refrigerated section, which are all very typical grocery stores.
I think its maybe a 'first world' view, that every body goes to Dollar Stores for the same things the upper class go there for. One source noted there are many times more Dollar Stores in Texas alone, than WalMarts across the entire USA. Gotta be a reason, and it isn't batteries.
The 'unfrozen meat section' is a prestige-item display case with really a trivial amount of product on display compared to the square footage dedicated to it. Vs every other section of the grocery, with racks 5-10 shelves high crowded with products. I honestly buy meat at the butcher counter maybe once a month, for a special occasion. Not a lot to do with 'what I usually eat'. Maybe its different for others.
We had Dollar G stores open near me. I do get groceries there as my most common item there, but it is in the form of 'grab some sour cream and a block of cheese' just before dinner is done. Dollar G is ~2 minutes down the road from my house, vs. Kroger or Wally World which are ~20 minute drives.
If I am going to go get groceries, I'm going to go to Kroger by default, Walmart if it's a particularly big run, Publix if I'm feeling like burning money, and Dollar G as a last resort, since the latter combines the expensive prices of Publix with the saddest store brand version of a product you can find, if they even have it in stock.