That would have been funnier PowPow, though not for me.
Sorry to derail your post a bit Ex 49'er. We can only speculate and point fingers at the fella, not knowing the true circumstances. I will say that a fire truck blocking traffic is a good thing in my mind though. Of coarse it creates safety for the firemen who generally have an emt aboard. Even if they don't have one all are train as first responders like any other emergency personnel.
Often the folks with injuries will need to be put on a backboard, then gurney and taken away in an ambulance. That generally means they will be in the middle of the road doing all of that. Even though many folks are very self centered I doubt any would willingly choose to kill someone over being late for work or wherever they happen to be going. An emergency vehicle impeding traffic or all together stopping it creates safety for the injured, those helping and those that may otherwise unintentionally create more injuries by running them over.