It's possible the officer's approach to the situation/suspect contributed to causing the result. Perhaps use a whole different approach (less aggressive and more conversational), or tase the guy sooner, or back off until you have backup before continuing the encounter. The outcome might've been the same regardless, and the cop did not deserve to get shot, but cops need to realize that just issuing commands aggressively may not be the best approach and the job may require more nuance especially given the target demographic.
That's not the point. An example of someone being hit by a meteorite in her living room doesn't mean that we need to armor living rooms against extra-planetary objects.
I think most police officers (those from sane departments) realize that they are unlikely to be victims of situations like the one depicted here. And police officers who are on edge are that way because of poor training, not because of any actual risk from their career choice.