It sounds silly, but it's part of the abstraction of D&D.Szordrin said:
While I understand the point you are trying to make, I don't think that somehow because you have more hp arrows now only graze off you and never stick into you.
If I fireball someone for 30 points of damage, that doesn't necessarily mean I inflict serious burns. Against a first-level commoner, sure, I turn him into charcoal. But if the target is a Brb20, I barely singe his eyebrows. Both take the same number of hit points worth of "damage", but the barbarian has a superior Dude Factor (TM kreynolds) that prevents him from actually being hurt.
Ever wonder why your PC has never lost a finger in a sword fight? Or why even a heavy mace can't break bones? Don't.
