Which is exactly what I have. You referenced that the only good avionics simulators are the ones written by Garmin specifically for their products. That's precisely what's driving my GNS530. FSX is only the physics engine for my set-up. Other than that, from my radios to my instruments, nothing is stock.
What makes you think I didn't have requirements? What I've put together was purpose built from the beginning to be a training aide. I suppose I could produce some User Stories if that would address some of your concerns. Many here advocate chair flying to reinforce procedures and flow; what many simmers have is just that but instead of using the imagination there's a tangible element. If I were just looking for a toy, I'd go old school and fire up X-Wing and go blow up a TIE Fighter.
Thanks to my sim I've been able reinforce real-world skills that I've taken from my training. I'm a 100 hour pilot in real life and I have a TON to learn yet as I progress. The sim in conjunction with services such as PilotEdge has accelerated my learning and have presented me with situations I would never have been able come up with while working my 40 hours under the hood. It's these scenarios and the amount of hours of real-world flying I would need under my belt to experience them is what has saved me money. I have no delusions that what I'm doing is 'real' flying but that doesn't mean what I do on my sim doesn't positively affect what I do when I AM flying for real.
For example, when transitioning to IR training. I needed zero instruction (other than one-off pointers) on how to function on an IFR flight plan, dealing with ATC, copying clearances, en route charts, IAPs, DPs, programming and using a GNS 430/530 and other Navaids, etc. As a result, my real flying was devoted to precision flying, partial panel, scan techniques, maintaining glide slope during a configuration change, checklist discipline because I wasn't worried about the procedure of flying IFR.
I respect what you're trying to say but I wouldn't be so quick to dismiss a 'game' that if used in a particular way can be an extremely effective training tool.