While that may be true, it is not the preferred way to stop an attack. While the perpetrator is bleeding out he may well kill you.
I was taught: two to the center of mass, then evaluate the threat, and follow with a shot between the eyes. The change in tactic is due to the possibility that the person is wearing body armor or clothing which is reducing the effectiveness of the bullets.
Legally, one is justified in shooting to stop an attack. If the shots also kill the attacker that is merely an unintended side effect.
I agree that two to center mass followed by a cranial shot if required is the only proper way to address the described situation. My comment about the possibilities of a lethal result from hitting the femoral artery were meant to point out that "shooting to wound" does not guarantee the recipient a long and happy life. As you rightly point out you may just succeed in making him cranky enough to take you down as well during the last minute or so remaining to him.
Moral of the story, shooting to wound is a very bad idea. If force is required use as much as necessary to end the fight decisively.