Trouble is most people buy a pup, raise it and when something bad happens they expect rin tin tin. It takes hundreds of hours of training to get the real deal and regardless of breed if it doesn't have the minerals in the first place you can't put them in.
Shepherds may have originally bred for herding sheep but how long have they been used a guard dogs, police dogs, prison dogs, security dogs, PP dogs, etc etc. I think its widely accepted that this is the breeds main role and has been for a while.
Not saying they are the be all and end all, I have seen and trained some real crap She