And going without may not be an option if one has a medical condition. Thyroid problems, diabetes, and so on require strict diet management or you could faint and otherwise present a medical emergency.
If you (or someone in your family) has such a condition, you make VERY sure there's the right food in the fridge, and one or more portions of the right food in the freezer. Always. It takes priority over going away for several weeks, then finding the fridge empty.