Except that this isn’t the only shooting by a startled cop. There are many posters talking about near misses and incidents with police.
Police tactics have changed. So much so that they have rules of engagement much more open then ones being used in combat. We have militarized the police force without a change in the chain of command to accommodate that.
There are bound to be near misses when people have little time to make such a momentous decision. As for militarized police forces, they are now fighting armies of drug gangs that are armed to the teeth. It’s long past the days of the local cop carrying only a revolver.