Learning primitive fire making techniques is certainly useful and challenging, but I suspect it will prove to be of limited value in most situations.

I have had to light fires in some fairly challenging situations, and I have always managed to keep suitable "modern" materials at hand. You can easily fashion a very complete kit that will weigh about 2 oz, with more than one method of fire lighting.

There are probably other kinds of outdoor skills that would be a better use of your resources and time.

Actually, come to think of it, I have spent more time putting fires out (wildland fire fighting) than lighting them.