The mindset is actually a large component of this guide, and it intentionally delays any discussion of "prepper gear" until it gets through a long laundry list of lifestyle tips and discussing the need to plan ahead, figure out what is likely, what can go wrong, what the decisions points may be, etc. In contrast to most other prepping docs, weapons are literally the last thing discussed, and only in a perfunctory way.
That said, I think that your view of emergency preparedness is far more narrow than what I aimed for in the guide. A significant focus of the doc is dealing with small-scale but common adversities, such as recessions / unemployment, house fires, backed-up sewage, and other "boring" but life-altering contingencies. Basically, the stuff that almost everybody will need to face at some point in their lives.
I'd wager that for 90%+ of the events that a typical person in the US is likely to experience, heading into the woods to forage on berries and hunt wildebeest is not the way to go.