Sad to say I have seen a lot of that
I washed my first dog because he was just not confident around strange people, particularly men and was fear aggressive with dogs. Also timid about the dark-stange things etc. So he is a pet with a lot of prey drive and health problems to boot (allergies, PF - sigh - well, he is a committment and we love him )
Have seen a lot worse out there than him being trained by people. At a seminar - two dogs who actively hid behind their owners and would not take food or toy from a stanger - not exactly what you want in a SAR dog.
So far the only flaw I have found in Grim is that he does hunker down a bit when her first gets on a slick WHITE floor. He recovers pretty quickly but nothing else bothers him (bleachers, steps, ramps, tunnels, rock piles, pallet piles, dark old warehouses (he can handle a slick white floor just find in the dark

)
The only problem with Cyra is her bitchy attitude around other dogs but she is not a killer. Not very dog social though but can work around them, she can even run free with a group but is a bit snarky about her space.
Grim could give a rats rear end about other dogs other than he likes to sniff them and savor female dogs urine.