[@PKMNB0Y]
There's probably some War Magus hanging around, willing to heal up broken bones and such for a price, so it's not like it takes forever to recover from injuries.

Basically, magic can nope a lot of issues if you have time. The main problem is that using magic in a short period of time is going to exhaust your reserves fairly quickly, which is why these broken bones and cut arteries in a singular battle ARE going to matter.

You can totally have them retire if you think that they would decide the rigors of monster-slaying is too much for them, and that they'd rather become a shoemaker in Hexxenacht.