It’s not only dogs that suffer from these purebred breeding programs, but cats as well. My wife has had a number of Persians over the past 10 years, all of ‘pet quality’ that weren’t good enough for showing.
These cats are bred to have extremely pushed in faces, some even to the extent that their faces are concave. Many of them have severe respiratory problems and tear duct issues which cause a distinct staining around the eyes. Fortunately the ones that my wife has had were healthy animals and didn’t have any of the problems which are caused by excessive inbreeding for the desired traits, which is why they were sold as pet quality.
The sad thing, I think, is how much these ‘desired traits’ seem completely arbitrary. Who cares if your cat has the most extremely pushed in face? The things they look for tend to make the animals look LESS attractive than a pet quality in my opinion.