Police officers don’t “shoot to kill.” They are trained to shoot to stop the threat by aiming where they have the greatest likelihood of doing so. Because the center of mass is the best place to aim for hitting a person (much less stopping them), they aim for that. It just happens that there’s also some major organs there. The Hollywood-inspired notion of shooting to “wing the suspect” or shoot a weapon out of a suspect’s hand is completely unrealistic & dangerous to the public (if the shot doesn’t hit the suspect, where does it go?).
Don’t want to get shot by the police? Obey their commands. Whether a person can continue to present a threat to the officers & the public isn’t up for debate. Comply with the officers’ orders & you won’t get shot.