There's plenty of more stories of where that one came from. Were you unaware of that?
It ultimately comes down to the relationship that you want the populace to have with their police force. A policy of shoot-to-kill tells the populace, that ultimately the lives of police are more valuable than that of any other citizen, and you better be terrified to be caught in any situation with the police where stress-levels are elevated.
A policy of shoot-to-disable, where killing an offender is a possibility, but it's a policy of using this lethal force as as a last resort, sends a message that the police actually care about the people they are trying to protect.
I'm not protesting police using guns, clearly there are situations where it's necessary to match and up the force of a threat. And clearly there are situations where police are justified in killing a human being.
I take issue to the police being justified in using lethal force as a first resort.
Surely we can train them better than "just try to hit the general area of where the suspect is, it's fine if you hit them in the head".