It may not be immediately obvious, but these are not "games" in the hobbyist sense of the word (though I suppose hobbyists may get interested, though access to

It may not be immediately obvious, but these are not "games" in the hobbyist sense of the word (though I suppose hobbyists may get interested, though access to this one in particular seems to be restricted to the military) but "simulations" for teaching and training. They are not supposed to be "fun". They are supposed to be analysis tools. Their goal is different to a wargame for hobbyists, where "playability" is usually a greater factor than the simulation of real war concerns. That's why it's OK that in a single day you can get one or two turns done. It's not a game, people who attend these exercises are doing work-related stuff. That's why it's also "not in stores".