Well, kirk-prime, you are right about the game not being really very militaristic.
however your average girl who is introduced to the game by, let's face it, a male who thinks she would be good or who is just so nerdy he can't shut up about it around her, will see it as a war game and little else, akin to stratego, civ IV, empire earth, starcraft and endless others.
so. i mean.... it's a shame, because dip is so unique, but that's why i think it is, for the most part. a lot of girls have just been conditioned to stay away from war-things.