Also lets put things in perspective. In the specific fantasy world we're discussing, There are magicks that heal endurance... which is the same field of 'science'.
Well, to be even fairer, as abstracted as "endurance" is, a Monster Energy drink and a Slim Jim would heal "Endurance," but would not stitch up your actual wounds.
And fair enough about 8-hours rest, but that's not really nonsensical in function
, it's merely obviously exaggerated. As, eventually,
, rest would heal your wounds. Or rather, rest + nutrients-and-such = healing.
Eh it's not about using the same exact thing but rather the technology associated with it....for your example....http://science.howst...ar-medicine.htm
Radiation therapy, while not a nuclear bomb, is clearly derived from the same/related science discoveries and is being put to use for reasons other than destruction.
So clearly it's not hard to imagine taking a form of divine energy and using it for harm or help.
I get that. Just... you can't use radiation to perform any task you want. Yet, magical energy can become fire, or lightning, or can alter your mind, or can speed you up, etc. So the rules of raw magical energy don't seem to follow the rules of any real-world energies very well.
Plus, radiation can aid in lots of "healing," but it can't knit your flesh back together and stop your bleeding. Thus, my example, more simply/immediately, was just to point out that just because some energy is powerful enough to do something doesn't automatically make its versatility equal to its power.
Anywho, magical energy that can heal wounds is no more inherently wrong than magical energy that can't. It's just two different options for lore, really. Nothing really makes magical healing an obviously existent thing, is all.