Breeders won’t do that though, else these problems wouldn’t occur. They’re either getting many pennies for selling purebred animals, or “prestige” from dog shows, which translates to pennies ‘cause now they have prize winning animals to breed.
Fake edit: Christ that was harder to find than I thought. Robert Schaible was a geneticist who bred Dalmatians, and among the various health issues was high uric acid, potentially fatal in that it can cause crystals to form in the urine and if they aren’t passed or otherwise removed, it is bad juju
He started a breeding project in 1973, breeding a Dalmatian with an English Pointer in order to get a gene to bring the uric acid levels down to normal.
Long story short, despite the project successfully reintroducing the gene into Dalmatians, it took 14 generations and almost four decades before the breed was allowed to be registered as a Dalmatian (with an asterisk!) by the American Kennel Club and UK Kennel Club, much to the chagrin of the British Dalmatian Club.
Related to that chagrin, while I am loathe to promote any type of dog show nonsense, as a consequence of the above, a descendant after 15 generations of Schaible’a project was allowed to compete in UK dog shows, eventually allowed to compete at Crufts (this is like… super top dog show in Britain, often televised) which, despite the dog being 99%+ Dalmatian,
upset these fine, upstanding citizens, who evidently prefer their doggies to be prone to potentially deadly issues instead of, you know, not.
TL;DR So yeah. Breeders these days prefer breeding desirous traits even if they serve no purpose beyond the aesthetic and leave the animals with horrible genetic defects.
Get a mutt, from a shelter.