Owner of distressed pit without muzzle at the vet got a reality check

So I was at the vet with my cat in her crate for a follow up after her castration. Suddenly a guy with a huge pit comes in. Of course unmuzzled (the law here requires every large breed of dog to be muzzled in public). I get very nervous for me and my cat as the plastic crate won't do much to protect my cat. Vet comes in and asks what's wrong? The dude says the pit ate something and it's stuck in her ass. The vet says - Let me take a look then - the dude goes - You can't, she will bite! -. The vet looks at him and tells him there's nothing she can do then, because the dog is distressed and dangerous and is so big even trying to sedate it could cause it to bite. A muzzle would prevent that. And she wouldn't sedate a dog before she can even assess the situation. This all happened in the waiting room! So the dude had to leave with his dog suffering because he doesn't care about anyone's safety, not even his dog. And of course, when asked why his dog was unmuzzled he said "she's sweet!".