As for getting constant hits in the face, neck, and upper chest area, you know, we just don't seem to see that result occurring with much frequency.
I find everyone's confidence in their marksmanship rather refreshing. We all know that anyone we want to shoot is just going to stand there and let us pump rounds into them. 20 rounds between their eyes? No problem!
Along those lines, even police officers and soldiers who train for a living with firearms do, in fact, miss. However, those of us civilians just can't miss.
Add all that to how every badguy just stops what their doing immediately the moment that first round strikes them, and a 22lr with 30 rounds sounds like a great solution. Hea, it's just like a shotgun, right?
Let's get real here. No one holds still so you can shoot them. Under stress accuracy greatly diminishes, and counting on an attacker to choose to stop attacking is instead of incapicating them is also roll of the dice I want to avoid.
Because of all of this your goal should be to stack the deck in your favor as much as possible. This includes choosing a carbine in a service caliber.