And then there's a momentary thought of this, and then I think how bad/hard it would be. Sitting there in a "call center", "Ding!" and you're suddenly thrown in to a car mid-collision, needing to take instant surveying of the situation (like "there's someone partly trapped under the vehicle", "am I in the middle of an intersection/interstate", etc., et al.
Even getting past that I think such a job would play absolute hell on epi, norepi, dopamine, etc., response and those people would burn out, quickly (and I say that as someone who spends a lot of time waking up to alarm tones going off before jumping in an ambulance or fire engine...).