I am still trying to figure out where you are going with this. If we are talking about a hypothetical "may" attack, then that qualifies every dog ever. That's not how we should treat dogs. We shouldn't be executing them because they "may" attack someone some day. I just don't see that as a good reason. I don't even feel that a dog that HAS attacked someone is a lost cause, as I've seen too many of those dogs rehabilitated when handled by the correct human. That's a more case by case scenario, but we aren't even talking about that. We are talking about a dog that hasn't ever demonstrated it was a threat for attacking or mauling humans.
I don't know when she adopted that dog, but most people tend to adopt purebred dogs at around 8 weeks since purebreds tend to come from breeders who adopt them out. They're in high demand. What I do have to work with is the dog's behavior that she described, and what information she provided indicate this was a perfectly workable dog. What else is informative is her constant mishandling of the dog by the description of what happened in the story.
This has all of the indicators of a story about a clueless human and not a lost cause of a dog.