Not true, it's the other way around (another perpective). A lot of the brokers & puppy mills that sell online sells the 'teacup' puppies for outrageous prices, thousand
s of dollars. Reputable breeders don't charge that much (here). I would NEVER buy another Yorkie puppy from a hobby breeder or back yard breeder for only a couple of hundred bucks. They don't do health tests, it's like playing Russian roulette w/their dog. I lucked out w/Momo, I bought him from a girl who was selling for her 'uncle', but I think he came from a PM. He has no major health problems, but he does have an enlarged heart (one side is much bigger than the other but no murmur) which is asymptomatic...for now. My dogs will be w/me for a very long time (I hope), but my next dog will be coming from a shelter, have my heart set on it. I also understand, since I won't know the health history, that it might have known/unknown health issues & I am willing to take responsibility for that too. I will NEVER support BYB's, PM's & Brokers/ re-sellers!
I'm not sure what the OP meant by all breeders should stop breeding & what that will do to stop puppy mills.
I respect ethical reputable breeders that do it right, to improve the breed, who do health tests. Who are they hurting? Nobody.