I throw tiny amounts away overall. I have a small fridge on purpose. It's the easiest place to lose things that then can't be saved.
It's very different from having freezer food and a store cupboard ime.
The store cupboard as a concept is for me why I've bothered posting here.
I grew up with having a backup in the cupboard as normal. But a lot of younger, more urban people have the experience of shops always being open and plenty of variety in them. My own young adult child will no doubt come home to be fed should there be a problem with their local shops!
I also know family who would rubbish the idea of buying extra for Brexit possibilities or even if there was bad weather forecast.
However they are in possession of a vast fridge freezer , a full chest freezer and enough tins and packets to run a small co-op!
They would also I believe soon rubbish the "bad planning" of younger people living less remotely if food supplies were a little rocky!