Thx for clarification! Unit should get 10% lower scatter instead of 10% accuracy then.
The way "accuracy" works in the game is it's a percentage chance to hit, multiplied by the target's target size. Because target size for vehicles can be over 20 (for example, the target size is 26 for Tiger I tanks), weapons intended to hit vehicles but not really infantry tend to have an accuracy of under 10% (for example, Tiger I tank's 88mm gun has an accuracy of 0.025 or 2.5% to 0.05 5% from max to close range). All infantry, however, have a target size that is very close to 1, which probably means the Tiger tank's accuracy statistic alone may cause it to outright roll a hit and be directly responsible for hitting an infantryman like, once or twice throughout a whole game if the tank gets to live and fight that long.
And so, for weapons with accuracy values like that, if the weapon is still meant to have any sort of reasonable effectiveness in damaging infantry, will instead rely on its aforementioned scatter values (a distance that is randomized to a maximum limit for every "missed" shot that will go to a spot away from the center of the intended target) and area-of-effect (BOOM THAT CAN STILL HIT NEAR PLACE WHERE SHOT DOESN'T LAND ON) damage.