People are spoiled. Instead of eating leftovers the next day, they want something different. Leftovers get forgotten, or simply pitched in the trash after a meal.
As a farmer until age 46, living on a farm while trucking OTR until 62, then helping part-time on a large farm operation over the past 9 years, I have seen the enormous changes in grain and livestock farming. Farmers have become so extremely reliant on chemical weed control, that if those products were to become hard to obtain, crop yields would plummet. Just getting the combine through that mess would be a slow operation.
Modern corn production relies greatly on LP gas for drying to a point that it won’t spoil easily.
A major collapse of the power grid for only a few days would bring chaos to the food chain.
That is only a start to a list of food related things this modern world is unable to endure the loss of.
Not me. I’m eating leftovers right now. Sometimes our entire meal is just leftovers.