GSDs can be highly variable. I think most tend naturally to be complete Teddy bears, if raised kindly with love. Some of those are high energy and joyous, for lack of a better word, but entirely devoted and incapable of any aggression with their owners. Others will be entirely laid back, and prefer lounging at the feet of their owners, or on the couch next to them, and are more or less dependent on being around the owner at all times to be happy. I’ve found that difference between joyous and laid-back relates to physical qualities, so it is probably genetic.
Some get badly bred, and have an anxiousness, or reflexive anger that gets triggered with excitement, and some can be trained into that by a bad owner. A lot of times, I think they are reflective of their owners in that regard. But in my experience, those are a very small component of the breed, and very unlikely to happen if you just look for good parents and raise the dog lovingly.
I agree with you entirely.
‘Bad’ dogs are like ‘bad’ kids - they are usually the result of their upbringing. (There are exceptions - but they are rare.)
There are professionals who work to re-train troubled animals; I’ve known one who was a genius.
But I guess it was just easier for the Bidens to farm the dog out. Doesn’t help the dog much, but I guess it’s convenient for the Bidens...
...and now they’ve got another dog to fail to train diligently.