They took this from us :(
>>16703468Breeders need to get high quality genetic stock from outside their lines to avoid inbreeding. This is done in one of two ways, with by FAR the most common way being to seek out dogs that got good dog show results. A dog that wins a dog show is likely to stud half the bitches in the area for the next year, and continue having a great stud career his whole life. That's thousands of puppies from one dog.
And where do people get dogs from for non-show purposes? Breeders.