If high hit points can be explained as skill at turning injuries into less serious injury, it still leaves a question about magic healing.
The solution - everyone builds up a tolerance to magic healing. It just takes more to get the same effect on the same person after a time.
As the title states, how do you all rationalize a 100+ hp character in a world where most common folk have 10 hp or so? I understand how mechanically it needs to be the case, as one needs to have the higher number in order to defeat more powerful monsters, but I'm approaching the question from a strictly lore sense.
I suppose the question might just boil down to what is the nature of hit points. I'd assume some part of it is just being tougher from experience, but I'm trying to figure out what about a higher level character would prevent them from being bbq'd by a dragon more than a normal person would.
hit points are just plot armor