Many people with a "cute little dog" who are going to breed it to their friend's "cute little dog" and sell the puppies will say, "I don't need to do genetic testing on the dogs/parents, I am not a breeder." If you plan a litter of puppies, you are a breeder.
Other people will say, "There is nothing wrong with the mother and father, they are perfectly healthy. I do not need to do genetic testing." Carriers of genetic problems are often invisible and without testing; you cannot predict whether your litter will be at risk for disease.
Some people will say, "I am only breeding pets and I have never seen any issues in the puppies I produce. I do not need to do genetic testing." Pets are just as likely to get the genetic diseases associated with their breed as show or working dogs and in any scenario, people are quite obviously emotionally attached to their pets. $53.33 billion was spent in the US last year on pets with $13.67 billion of that spent on veterinary care alone (source). Many genetic issues do not get diagnosed as a genetic issue or may develop ...