While that is true in many cases, and I agree with you for the most part, my mother loved her dogs, and made choices to put their health and well being over money or breeding them. She did have her dogs spayed and neutered rather than risk another litter when she was informed of issues she had not previously been aware of. (my sister became a vet and explained some things to my mother.) My Mother even chose to have a young female spayed before it ever bred, because it had been a runt and the male was twice her size, she did not want to risk the little female to delivery. I would label my mother an uninformed breeder, not irresponsible, though I admit she should have looked things up before breeding.
I myself could be labeled a backyard breeder simply because I will be breeding my Sibes. However, a lot of time and effort was put into getting the right male to pair to my female, it was not random, "that pup is cute, let's breed him to our girl". We listed our girls faults, contacted reputible breeders and found a male that comes from a line most likely to correct/balance my girls faults. This included going through many pedigrees and lines to find a good fit. Time will tell if we made the right choice. My hope is to produce a puppy, hopefully female, to show in confirmation as I had originally wanted to do with my female. I may show my male, but am having trouble getting him ring trained, which is why we are attending confirmation classes together now. To help prepare us both, even if he doesn't show, training him, and learning from my mistakes should prepare me to show my future pup.