A question was recently raised in a discussion group where I participate: why, from a combative perspective, does modern kendo target areas for victory which are not congruent with those necessary for victory on a battlefield? Here are the point-scoring areas: let us consider them in turn, looking at the armor of a classical warrior, viewing one version linked here. To be sure, there are myriads of variations of armor, worn in different periods of Japanese history, but some general principles can be derived, even from more limited armor such as this kogusoku here. The head, protected by a helmet, or even a reinforced band, is not really a viable target, whereas the sides of neck, eschewed in kendo (and in older kenjutsu schools) certainly is. The throat is certainly a target, but note that even light armor often had a protector for the throat. And even in light armor, the outer surface of the wrists (unlike the inside) is well protected. And finally, the sides (do) are certainly well guarded with heavier armor, unlike the hips or backs of the legs.
The easiest answer is one that I heard from Donn Draeger many decades ago: true combatives attack the most vulnerable areas; combative sports deliberately attack the most protected or guarded (“hitting below the belt” is forbidden in boxing, for one of almost infinite examples).Not only does kendo attack the armored areas, it attacks the areas that are easiest to armor.