I am thinking that we might make a distinction between what is necessary in a normally functioning urban situation, with all the usual services intact, and what you would need when things are going south - a widespread power outage, bad storms, etc.

In an extensive power outage about a year ago, driving on our city streets was a bit too much o an adventure - no lighting on or near the streets and traffic signals were either dark, blinking, or functioning. Driving, even on familiar streets, was a real adventure under those conditions.

Imagine what a significant earthquake would do to urban areas (there are lots of historical examples). You would need a lot of items more commonly associated with the outdoors, as well as the ability to shut down gas lines and electricity, etc.