This is true. That's why the Prepper needs to also become a Producer. Then he will achieve balance.

That is the only sustainable course of action over an extended crisis.

Prep now to live self-sufficiently, without the comforts of civilization. That means have food for when the food runs out. But that also means produce your own food (or at least prepare to do so) in order to provide food sustainably into the future.

Perhaps you've heard the old saying?:

Give a man a fish, and you feed him for a day.
Teach him to fish, and you feed him for a lifetime.

It's a similar concept:

Store food & other essentials now for your short-term needs.
Then grow & raise your own food for as long as needed into the future for your more permanent needs.