I agree with you: the honesty of the breeder
is the only thing that matters.
And, while I do believe that there are "skeletons" in virtually every pedigree, at some point, it becomes increasingly-important to understand the truth based on
how much focus is being put on the falsely-papered animal.
In other words, if the great-great-great grandsire of your pup was falsely-papered, it really won't matter much at that point. However, if the entire foundation to your yard is based on a falsely-papered animal, it might well affect your ability to make wise breeding choices by knowing the truth of what is behind your stock, genetically.
For me it didn't matter too much, because Poncho was such a good producer, I just focused on him and everything turned out okay. Still, I might have made even better choices in many of my earlier breedings, had I dumped most of that so-so Bolio blood I had and focused on better overall animals, more closely-related to Ch Hammer. Not saying I didn't get some great dogs out of Poncho with the choices I made, because I did, but that is only because Poncho was 'carrying' most of the bitches he got bred to. I didn't understand the truth of his breeding when I was first starting out. All I knew is that Poncho and Missy were head-n-shoulders better than the other "Bolio" blood I had worked with up to that point.
Fortunately, because Poncho was so prepotent, and because I focused on him,
his traits quickly dominated my yard and my gene pool.
Glad to hear it
Jack