I dont’ know what your brother means by “professional” breeders but he needs to remember that any time you paint with a broad brush you are probably wrong. I know people who say all Vets are money grubbing idiots. And of course, they’re wrong too.
As for this little dog, very sad story with a happy ending. As someone quite involved in the sport of purebred dogs, I have heard of cases where show breeders turned into what i guess would have to be called hoarders. Like in anything people are involved in there are saintly people and there are awful people and then most people fall somewhere in the great middle. Most show people I know are just like the people who are commenting here. Regular folk with a hobby, and most of them love their dogs and will be horrified when they read this article.