As with all bushcrafty stuff, it's a learning opportunity for both of us. A ferro rod or lighter + cotton ball is my default fire starting method but options are good to understand. Char cloth (or other charred material) is something you can improvise in the field to extend one fire into many. Add in learning to identify and use natural flint/quartz/chert/etc. and steel, and you've just upped your self reliance factor.

Understanding the theory is one thing, but I need hands-on experience to really learn something, especially if it's something I want to be able to rely on in a high pressure situation. Read/hear it, watch it and then try it and try it again. My son learns best the same way.

It might only need heat + fuel + oxygen, but fire starting is something that can have many variables. Even perfect practice doesn't mean perfect next time. The more practice the better!