But it's abstraction that has no real world equivalent. Hitpoints stand in for blood loss and organ trauma.
In a very very abstract way. There is no way anyone really comes to within a hairs breadth of dying (say 5% hit points remaining), lies down for a few hours and then is ok to enter another fight. More like months to recover and then maybe never walking properly again, or with only 1 arm or something at that level of damage.
In my opinion it's not any more of an abstraction to say that an NPC will eat a poisoned apple or something placed on their person just because they felt packish and thought they must have forgotten they put it in their bag.
It's just a new abstraction so it's unfamiliar and feels out of place at the moment, give it a bit of game time and I think it will fit right in for stealth chars.