I think I might see what you're getting at. You are right to a certain degree to question, for example, carrying steel wool in your survival kit for the purpose of starting a fire using flashlight batteries.

There are two aspects to survival: #1 Preparation and #2 Improvisation. Sometimes we get the two confused.

Ferinstance, many survival manuals show how to start a fire with a lens. Seeing this, we go and put a magnifying glass in our survival kit to be used as a "survival firestarter". This is backwards thinking - the manual shows this method because someday you may not have a trusty BIC lighter handy and will need to improvise, not because the lens is a very good method.

On the other hand, there are some items that can be so very useful in proportion to their size, weight and cost such that there is no reason not to put them in your kit. I can't imagine any kit into which I could not manage to cram one (more) sewing needle and one (more) fishhook.

Anyway, I'm curious as to what exactly is in your PSK?