[Logically, with her prior experience, she knows this... yet it's still very hard to imagine living somewhere with so many people that you can't simply get the food you need 'for now' and not have to worry about wasting it.

(She was introduced to the concept of tinned food in The Box, but never really took to it.)]

Have you never really had to gather food for yourself? Pick it, cook it, learn which things aren't going to give you a stomach ache?