Argyle King
Legend
So why can't a 'hit' that deals a small amount of damage be considered taking a jarring hit but your amour absorbs it?
In a lot of other rpgs, that's exactly how it works. In those rpgs, armor doesn't make you harder to hit; it makes you harder to hurt. So, someone in full plate might actually be easier to hit in some of those games due to being less able to dodge or move quickly, but it takes a lot more damage to actually punch through the armor and damage the guy inside.
D&D (typically) uses AC and static defenses, so the majority of what would actually be going on during a defense against an attack is just abstracted into a d20 roll versus a number.