There's nothing wrong with trying to educate someone on the health concerns, but I'll be honest, sometimes it comes across to appear very cold instead of helpful. This is why we see people distance themselves because they feel intimidated. Hence my point that everyone is human and you need to understand that fact before asking "why on earth would anyone do that?".
My suggestion is that maybe some of you need to look at how you direct your responses and perhaps try a different approach. I think it's great that the knowledgeable individuals on here take the time to educate us on the important health concerns and the guidelines for finding a responsible breeder. I really do, but unfortunately it comes across very cold and harsh at times and that does not help the situation as a lot of people will distance themselves from that type of behavior.
The idea is to be helpful and understanding, not judgmental. We could all benefit by learning more about this breed and I think sometimes that passion can cause us to get a bit emotional about the topic. No one wants to be lied to, no one wants to take in a Basenji that is Fanconi positive expecting a healthy dog, etc.
I'll make one other point, the reason why some of these irresponsible breeders stay in business is because they are very warm when it comes to interaction with the customer. This attracts business, it's very straight forward.