You are simply wrong.

I was a vet tech for many years, honey, I've seen a hell of a lot more than you probably did answering phones. I interacted with breeders all the time, good and bad ones, and it's very very obvious what the differences are.

The word 'bloodline' does not mean eugenics or narrowing down the gene pool, LOL oh my god. You don't even know the difference between backyard breeders and puppy mills. Ethical breeders take very careful care to make sure all their animals are healthy, well-socialized, and to breed standard. A German Shepherd breeder, for example, screens all their dogs for good hips, for any sign of degenerative myelopathy, etc. They require full hip rads at various stages in the puppy's life, they follow the health of every puppy in their litters. These are not people who breed for money, they do it for love of the breed. All litters are carefully planned, with heavy research into both parents, and puppies are sent to homes that are vetted thoroughly. The breeder chooses which pup the new owner gets, not the other way around. They take care to ensure proper socialization, give them a good foundation of training, and pay for a full health screen for every puppy before adoption. These breeders also often require contracts that the dog can only ever be re-homed back to the breeder, no questions asked.

This is NOT the same as a backyard breeder who sells "AKC" doodles to people off FB marketplace and lets them choose based on what color or sex they want. Those puppies get just basic vaccines and if there's a problem, will only accept exchanges for another dog. They breed for profit and for looks. An AKC registration means nothing, it's a piece of paper they can buy off the internet.

These backyard breeder puppies, as well as the puppy mill puppies, are the ones who ended up with us with parvo, with giardia, vomiting, with bellies swollen from intestinal parasites. The tiny 1lb yorkies brought in dying from hypoglycemia because the owners weren't told how to properly feed them. The badly socialized puppies who were sold at 6 weeks before they were even weaned, who turn aggressive and now the owner wants to put them down. These are the puppies that are sold to owners who have little to no dog experience. Who cannot afford treatment beyond the basic annual rabies vaccine (do you want to know how many times I've had people crying in my exam room when I tell them what parvo treatment costs and they tell me they have only $25 in their bank account, after they bought a puppy from someone selling puppies at a Walmart parking lot?). THESE are the animals that end up filling shelters and have to be put down.

It's not a black & white issue as much as you want it to be. I don't know where OP got their dog, but it was definitely not an ethical breeder. It's absolutely wrong to paint all breeders with the same brush. That's simply not how it works.