If you go into most "general" hobby shops nowadays, the auto selection equals to all the military models: aircraft, armor, & ships combined. At least around here. Then of course you have your sci fi stuff, which may or may not be sci fi military related. Only at the scale model hobby shops locally do military models dominate, and at those the autos, both pre built die cast and kits, and sci fi stuff are making bigger and bigger inroads. I suppose the changing demographics of the customers has something to do with it. The younger modelers around here seem to be more into their cars and sci fi kits more than the military. Perhaps that goes with the general population overall. As mentioned above, the older guys here grew up in a military draft era, and were immersed in a living memory of WWII. Many served themselves in the post war, Cold War, Korean War, Vietnam war era, or had friends or family who did. Nowadays, reportedly only 1% of the nation's population serves or has served in the volunteer military. The same interest seems to be taking hold in the hobby.
Model companies do produce those civil subjects in various categories- ships, aircraft, figures, etc., from time to time. But those subjects tend to languish on the shelves I have noticed and are often later sold on clearance. Not exactly the best way to generate a profit. Just like Hollywood keeps churning out movies of a particular type, so do the model companies keep producing kits of a particular genre. Why? That is what keeps them in business.
I have no interest in some civil subjects, others a marginal interest, yet for some reason military models are a passion for me. Personally I have put comparatively equal amounts of my blood, sweat, toil, and tears in both certain items of military equipment and law enforcement equipment. Have I ever said, Oh I gotta have that Ford Crown Victoria or Chevy Caprice Classic patrol car kit? No. but when a M901 ITV kit came out, I HAD to buy that ASAP. I still dearly want the new Tamiya Gamma Goat and when I squirrel away enough spare change I will buy one. I can not explain why, but maybe it's like GM said above, I like things that go BOOM.
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM