Itzyu, that's great information. I like the house analogy.
I don't think TwinPeaks or Northern Gurl are the breeder. I do take them at face value as having purchased (or about to purchase) dogs from the breeder, and loving their dogs very much. We've seen this before a couple times, where owners get defensive about their breeder perhaps because it can take a long time to find just the one and we feel some investment in our decisions.
Yet, it does sadden me to see such incredible defensiveness around the practice of not testing – this should not be condoned. To this day, anyone can go to the OFA database and note that there is one single Fanconi test listing for this breeder's kenne (and no other tests publicly listed, whether or not she did them)l. That is what everyone is saying is not okay here, for all the reasons outlined by more experienced voices above.
If the breeder has a change of heart and starts testing, I for one would be more than happy to commend her for her progressive actions. Better late than never.