@Kaarme Well, it could be sort of justified if the country they lived in was unreasonably militaristic, putting great emphasis on martial skills, thus valuing battle mages above all else. But then someone who can heal anything should be invaluable too as a combat medic. That could only be negated of the country was at the same so stupidly "honor bound" that they considered healing woulds shameful in some way.
But well, that's just your typical silly fantasy tropes.