Tim,
I definately see your point, and indeed we could cite many more examples of operational GA specifics with which most FJ chaps would be unfamiliar. However, a FJ pilot will definately possess the poling skills required to throw a light aeroplane around the sky (once he's overcome the probable ill-ease he feels at the rate the outside world is passing by...), and I suggest will also have the mindset and airmanship to recognise the need for many of the things you talk about. For example, the requirement for a comphensive pre-take off emergencies brief, tailored for the circumstances of the day, will at the very least make him think through some kind of go/no-go point if so required.
While he may not appreciate having to refuel his own aeroplane and clean the bugs away, it is hardly beyond the wit of man! A completely different form of flying, yes, but not one he'd necessarily be unable to cope with. Incidentally, when did you last walk the 'strip' at your normal haunt?
KP