Training for a day that I pray never happens: Have you ever hoped it was for naught?

I find myself asking what I can do to further my mission. I obtain extra-curricular training to augment my mission parameters and assist me in being a better soldier. I find myself longing for the day when my efforts are fruitful and that's when it hits me: In order for me to obtain some tangible benefit from my efforts, something very bad must happen; many must suffer or even die in order for it to be bad enough for us to be called into service. So then, I must pray that my skills have been obtained unnecessarily. Whereas unlike a doctor where a need exists whether there be competent people to fill it, in the case of disaster or war neither is as prolific as sickness.... if I were not here, would there be a void or am I just training in futility?