Aura instead of hit points

[chevyboys]

Hit Points are an abstract construct and roughly equivalent to Plot Armor.

How do characters survive falling off a cliff without serious injury, such as the 20d6 damage cap for falling 5e? The answer is simple, poorly written rules that break verisimilitude.

Why do healing spells not heal as much as damage spells? Well, healing and fixing something is often much more difficult than destroying something. Another explanation is balance, or an at least an attempt at balance.

As much as I agree with you, I am trying to create a narrative reasoning for these things, rather than chalking it up to poorly written rules or plot armor.