I have heard that.

My brother travelled East Coast to West Coast in an open top Mustang many years ago now.
He could not believe the state of the food across the country.
It was fine if you're on vacation and it's time to overindulge, there was plenty of amazing food for that.
But he got home feeling desperate for fresh vegetables and unprocessed food.

He also found the widespread use of disposable cutlery and crockery in motels very strange.