[Lucky Jim]

I totally agree with what Marine Prepper says in his vid about fighting dirty..
Once you start playing by the Hollywood-movie rules you'll be dead in 5 minutes.
I only managed to stay alive on PC wargame battlefields for 10 years by using every ounce of cunning I could scrape up.
Believe me, every prepper should do PC wargaming because it's a great learning tool, I don't mean kids slap-happy arcade shooting games, but real adult games like Armed Assault.
This vid (below) gives a good feel for Armed Assault (Arma2), as you see it's not all about running around gung-ho, but needs careful planning, use of cover, positioning etc.
And it's not complex to play, you can play it with just half-a-dozen key press commands and mouse-clicks:-

 

[Lucky Jim]

..PC wargaming can teach these things at an academic level... Psychological and physical degradation from both internal and environmental stressors cannot be simulated at a game console..my blood sugar level can drop dramatically..but I don't have any day-to-day blood sugar issues. I keep half a dozen four-ounce tubes of cake frosting in my pack and at least one in an available pocket..

Yeah, the body is a chemical machine and if the equilibrium is not right we're in big trouble!
I'm not diabetic, yet like you I sometimes get hit with blood-sugar issues when cycling or hiking; the first warning signs for me are dimmed vision with spots before the eyes and lightheadedness, followed by a cold sweat, my stomach screaming out for food and the verge of collapse. So by sitting down and cramming myself full of food and drink I can avoid blacking out completely, and half an hour later I'm right as rain..
(Even better, I find popping in the odd sugary sweet/choc bar/banana while I'm walking or cycling along will usually prevent an attack; the trick seems to be always having a little something in the stomach rather than letting it get empty, just enough to tide you over before you stop later for a proper meal)

As regards PC games, you're right of course, they can never fully reproduce real-life conditions but they do give us an excellent "feel" for general tactics and 'situational awareness' and how to navigate by compass across all sorts of terrain etc which will stand us in good stead against zombs.
Likewise with flight simulators, a real-life flying instructor in a flight sim forum says that his best students are the ones who play flight sims at home because they've got a head start..
The military use all sorts of simulators too, like this one-