First of all, spoiler warning: this topic will touch on WHM job quest.
As someone who never played other FF games I've been wondering what exactly does healing magic (mostly White Magic I guess?) do? Yeah, I know it's "magic" so you can't logically explain it, but I feel like I'm really missing what exactly am I healing other than a bar floating above someone's head.
Let me explain. We can resurrect people and it was even included in early WHM quests, so it's not only combat mechanic. Despite this there are NPCs that die in our arms and we can't do anything about it. I always accepted it as natural part of story that can't change too much just because you are running it as a healer and not other class.
But then there comes last part of WHM story. I always thought it'd be cool to be healer because you don't need to be afraid of dying to some disease or wound and could save people close to you from it. It turns out you can't actually heal anything other than "corruption" and maybe some flesh wounds.
It feels like white magic is just slightly better version first aid kit.