What appealed to me, and what has been true in my experience, is that components are available singly at much better prices than offered in the pre-assembled kits. Starting with the generalized home kit, they then discuss its for more specific situations.

I was struck by their specific inclusion of a lighter for "wilderness" situations, where lighting a fire for signalling and other uses could be critical.

The article seems to be trending toward a FAKASK (first aid kit and survival kit) which rings true in my experience. Once you have tended the fractures, etc. you have to keep everyone in as comfortable condition as possible, until transport to definitive care... Believe me, this can involve everything you have in your pack and then some. Not an issue in urban areas, where the ER is just around the corner.