Yeah, I get that with fish. However, there isn't that big a variety in personalities between fish, and they don't have the potential to seriously injure their owners. A irresponsibly bred GSD could kill if it put its mind to it, and here they're selling them for $5,000 with no care for anything accept money. A responsible breeder won't let you choose a puppy of your choice, period. First they carefully screen you, making sure you'll be a responsible owner and are the perfect fit for their breed, then they have you sign a bunch of contracts about what the breeder has permission to do if you mistreat the puppy (in other words, they can take the puppy back if they feel you're not providing adequate care), then they do temperament tests and observe the puppies before *finally* matching you with a carefully selected puppy that they chose. That's why I, unlike the rest of my family, don't dislike breeders. The good ones are improving the breed. The bad ones however, are essentially killing shelter dogs (
https://rufflyspeaking.net/how-to-kill-a-shelter-dog/) See why there's a problem with buying any puppy, of any breed, from a puppy mill, whenever you want (this is not aimed at you, just a rhetorical question for anybody reading this)?
I would agree with you for your second point, but I've heard a LOT about people putting phrases on their breeder pages about health and vets that doesn't mean anything. Plus, every. Single. Mass puppy seller ever, or even breeder database, like that claims over and over how their breeders are carefully screened, and they only choose the best of the best, and less than 1% of applicants are accepted, etc. I've also discovered that just because a breeder/site claims something, you can't go on the principle 'well, even if they didn't run every single one of these tests needed to produce a flawlessly healthy puppy, they must have done a lot because they know that in order to produce happy puppies they need to do these checks'. Honestly, researching breeders has been a huge call back to reality for me. Just because they know that this and that are needed for healthy and happy puppies, it doesn't mean that they'll do anything more than claim they did this and that.
Sorry, more ranting because this has all been bottled up inside me for way to long without anyone to talk to about it XD