Lots of people in the south don' t have all of their teeth either. It doesn' t mean we should all copy them.
Neck shots do work,sometimes, but they are not the best way to KILL a deer or any other animal. I' ve seen too many deer with broken jaws or gaping holes in their throats due to the attempted neck shot to save a little meat. This is including one that I' m butchering tonight, thank god my buddy shot her when he saw her lower jaw hanging down by her knees.
Not many with two busted shoulders get away. You have better eating meat in the neck than in the shoulders anyway.