Food and cooking lost a lot of value in our culture for many years. We started optimizing around the wrong things (fast and easy - cooking is a struggle!) and then again after more wrong things (lets replace fat with extra salt and processed foods!). And only lately has the idea of “fresh and seasonal” started to become more mainstream - again. Where as before the War it was what people did because it was how it was.
There’s a lot of good cooking in the USA that just vanished from before the War. Very localized dishes, lots of stews. Some old cookbooks reveal how much we’ve changed and have also reclaimed old values.
This digging up of pre-industrialized food cherry picks the best of each area and uses higher standards for food quality and safety (that would have been unfeasible generations ago).
I'm not knocking regional food, I'm glad this is happening and love to see and try new things. I hate seeing the US covered by the same handful of chain restaurants.
We've come full circle now where inefficiently producing and purchasing high quality ingredients and having the time and resources to cook them is now the higher class activity VS the efficient processed food sold to the masses.
The other thing wrt television... old cooking shows were boring. Throw in a dose of reality tv, make it exciting, and people will watch. It's also one of the few tv shows where a person could pretty reasonably recreate it, probably simplified, within their own home.