Brett,
I used to work in IT until the 90s, mostly supporting engineers. I then moved to databases in banking/finance/pharmaceutical industries while doing a university degree.
I never served in the military and I don't have an engineering or a design degree.
None of these things particularly bother me since the one thing I did learn in university is that experts can get stuff really wrong.
Many great discoveries were made by amateurs.
My degree was primarily in economics and international relations, so you can perhaps see how I got that idea.
My interest in military 'stuff' started when I was still a teenager, though I was never really attracted to guns or extreme sports.
What interested me more is why certain high ranking officers made certain decisions that led to certain outcomes.
Based on my reading I soon decided that chess was a really 'limited' game.
I took up wargaming in the 80s, and was enticed into Traveller in the late 80s, though I wasn't really into RPG because I found quite a few participants were er...'unstable' and often irrational for my 'taste'. My interest in Traveller persisted for only a few years because the one game master (i.e. the only person who was interested in writing up adventures) moved away/disappeared.
However, I did persist with Striker for a time, and even bought the 2nd edition rules though by this stage I had definite ideas about wargaming also.
My military history/warfare research started in the 70s generally focusing on the Second World War Eastern Front, which led me backwards in sourcing Soviet doctrinal thinking to the American Civil War, and forwards into the (at the time) AirLand Battle.
My current activity is, or rather was, focused on 'selling' the USMC a doctrine and vehicles designs, however the USMC colonels have a huge problem in listening to a civilian. They would rather lie, including to the Congress, and go one wasting time and money than admit that a civilian has a better idea than they do. The USMC share this trait with the US Army.
So I'm not a stranger to being told it isn't possible that I should know something that 'everyone' disagrees with.
This used to bother me quite a bit until I discovered research by Greg Berns (see Iconoclast).
Along the way I made a few peripheral discoveries, so I'm considering going into consultancy, helping companies with innovation.
Greg