I see where you are going, they seem off-track. The LE guy does have a point in that 230gr ball penetrates barrier materials much more effectively than any jhp made, just not body armor.
I would have to disagree with their target anlysis as the brain stem is actually located within a small triangle shaped area that is accessible by shooting through the bridge of the nose at just about occular cavity level. (It is true that a shot that misses will most probably be a grave wound indeed but your target will not be incapable of muscle based reactions.
That said I have never met anyone that could actually make a brain stem shot on demand with a handgun and the only gunfight survivors I know that made headshots were deployed in position with the ability to carefully place thier rounds on target.