Amen to that ...
In having family-bred my own line of dogs, longer than most any old-timer in history has ever actually sustained his own line of dogs, that all trace back to the first dogs I ever had, I can absolutely tell you that what most people say/think about inbreeding is absolutely false (or, at best, full of half-truths).
Most people are like parrots, "repeating what they hear," with absolutely zero knowledge on the subject of actually maintaining a trans-generational family of animals ... and keeping them competitive.
I am sure this kind of first-hand knowledge of conditioning ... as well as of judging/pulling-down a dog to find its "best weight" ... also applies to years and years of first-hand experience.
Jack