But Hipoints aren't part of the lore. That's why Orsino can use one fireball to kill a bunch of Qunari in cutscene which can't happen gameplay wise.
Hitpoints are supposed to stand in for physical well being. The problem is that game developers have taken that concept and then completely seperated game play mechanics from any concept of reality because that's just easier than having to work within a system where the hit point pool reflects the character's health at any given point in time. There are ways of making hitpoints match physical well being, such as implementing a dodge/parry system, a real magical barrier system or the like, but game developers simply don't want to develop the man hours that would be required to reintegrate hitpoints into physical well being.
However, just because developers don't want to, doesn't mean they should continue to allow the game mechanics and game world to exist independently of one another. If fireballs no longer one hit kill when using the game mechanics, then they cannot be allowed to one hit kill in the game world either. If they won't make the game mechanics match the game world, they must make the game world match the game mechanics.
I'm so sick of cutscenes like the one where Jack blows through 3 YMIR mechs in a matter of seconds, blows through the facilities walls and basically single handedly destroys the prison space station using just her biotic powers, but then fails to be able to kill a single enemy when the player is actually in control. If you are going to make a character a super badass in a cutscene, they need to be just as powerful outside of the cutscene. Conversely if you are going to make them super weak during the game play, you need to make them super weak within the confines of the game's story/world.