A nominal human diet requires a certain minimum amount of protein, and related essential amino acids, and vitamins.

Eggs have until very recently been a cheap source of protein as an inferior good compared others.

The problems in shortage are when the prices of all necessities are being driven up across the board to the point where you can't afford food, where government SNAP programs cannot keep up.

This is the point where it becomes food security, and yes you can go further into bootstrapping your own dependency grid given more resources. At a bare minimum it provides goods you can trade for other goods which is more food security than you had when you were completely dependent on others and the currency retaining a stable store of value.