Maybe I am pushing the envelope too much.

I am thinking of getting caught in a situation where you have essentially exhausted your ability to make fire, perhaps by repeated failures, or had the ability to make fire forcibly removed from you by injury, accident, or otherwise, barely succeeded, and cannot or do not want to go through that again if you can possibly help it. Instead you strongly need to preserve your first fire.

Then, perhaps going one more step too far, I threw in a need to move or travel - to avoid risk, for self-rescue, whatever - which puts you in a situation where you need to carry a bit of that first fire with you.

Hopefully far-fetched but not beyond imagining. And perhaps educational to add to your survival contemplations and preparations?