Coal used to power entire countries, and it still runs our steel mills. American industrial might and American quality of life was only possible because of our coal miners. A Walmart stocker puts cheap Chinese stuff on shelves.
The typical romanticized coal miner is a masculine figure, a breadwinner, the representative of an industry that might have been core to the family and town for generations. A Walmart stocker is a guy in a T-shirt. Walmart itself is famous for... pricing out local businesses whenever it comes to a small town.
I'm not at all denying that it's a culture and glorification thing. I just think this is a factor people sometimes miss when looking at how a lot of the country is nostalgic for the 20th century economy, and why people keep wanting (mostly via vibes) to reindustrialize America.