...A firelighting kit is simply a waste of space...
Are you thinking about certain fire starters that are relatively large? In a pinch, I could fit a highly dependable fire starter underneath the band on my watch. For example...
http://firesteel.com/products/FireSteel-Miniature.htmlWith that tiny rod and my other equipment I would have with me, I can start a fire in a wide variety of conditions. Without any planned fire starter means, I doubt I would be able to start a fire in a variety of conditions.
Is everybody here doing a fully informed cost/benefit analysis?