And vice versa. As a breeder, if I'm selling a dog for over $7k that I have put many years of training into, I would want to personally fly the dog to the buyer and see them interact in person. To confirm that the buyer really does have the temperament and leadership personality necessary to own and manage a Type-A dog of this caliber.
As your daughter said, these are working dogs, not pets. These are machines. Just like you wouldn't bring a Komatsu trackhoe into your back yard and let the kids and cats and ducks and other dogs play on it, you shouldn't let a high-drive, Shutzhund 3 dog into your backyard or household without the proper training, transition time, and always, ALWAYS, proper supervision when children and other pets are concerned.
There is fault on both sides here, but anyone can talk a good game, and I suspect the buyer did most of the "selling" on his ability to handle such a dog.
If you look at the website you’ll see that the training is more institutionalized rather than you spending lots of time with a single dog. You’d be selling a one off dog where they are selling to an extent a commodity (protection trained dog). They don’t have the same amount of emotion tied into the dog you would. Doesn’t mean the dog isn’t well trained or taken care or anything like that.