That indeed looks like a fine kit for minor , disabling owies. Kits should be developed to work in the situations that are anticipated. It seems that J-I is working for something rather more serious, with moderately long term care (24 hours is an eternity if you are dealing with a serious situation). You need to consider what is essential for you to carry to handle predictable situations and what can be improvised from readily available sources. A lot can be improvised.

I once taught an Advanced FA course to an Explorer Post, who were very heavily into outdoor trips. At one of our sessions, I had them bring in their backpacks and respond to various scenarios. It was great -I was learning as much as they were....