For what it's worth, I just did a quick online search, finding (apologies if I'm getting any info wrong here) that in the USA fire-fighting vehicles are involved in about three collisions per year with pedestrians or bicycles. About 20% of those incidents results in fatalities.
Accidents happen. Not one of us is more or less than human.
Who doubts that as we discuss these events with such detachment, the soul of that truck's driver is in torment?