How could you view this as anything but inevitable? Just imagine a factory cranking out millions of drones that can fire small caliber bullets, or with small explosives, or some other weapon. A bit of AI and a few guys in a bunker can destroy a huge number of conventional troops. Anybody who doesnt do this will be spending lives at a non replaceable level, or spending an unnecessary amount on killing the enemy. It will be a new kind of brutal on par with WW1.