Earlier quoted context omitted.
Your example is already biased, because you use Walmart as the other option. Walmart already came through and blew away the local mom and pop market in these rural areas. Are they more convenient than driving an hour to a walmart? probably. I've seen small family run stores go out of business specifically because they can't compete with a dollar general that opened a mile away. "Deeply beneficial" seems like a strong…
This is assuming "mom and pop stores" are beneficial. We certainly like them when driving through picturesque small towns but I know a lot of people living in those towns that prefer an efficient supplier. They understand what they lose but prefer to save money on their shopping trips.
Walmart not only sells merchandise cheaper than "Mom and Pop", they almost certainly pay their employees higher wages than Mom and Pop ever did. They also have a 401(k) (fully-vested after only 7 years) and an education program that covers tuition, books, and fees for majors of interest to Walmart (e.g., IT and supply-chain management).
The opportunities for advancement at "Mom and Pop" were pretty much limited to "Son or Daughter". By contrast, the current CEO of Walmart (annual compensation $22 million, net worth > $100 million) started working there as a summer job in high school, unloading trucks, and has never worked anywhere else.