Real life is not like the movies. People don't go down after the first shot unless you hit something critical. Shooting center mass provides the best odds for d

Real life is not like the movies. People don't go down after the first shot unless you hit something critical. Shooting center mass provides the best odds for disabling that person and the best odds to hit your target. Shooting a moving target is already hard enough, trying to shoot at the legs of a moving target is even harder. You also have to consider than an officer is responsible for every round that leaves the barrel. If you miss, thats just one more chance for that round to hit an innocent bystander and increases the odds that that guy with the knife is going to reach you before you can take him down.