I have much respect for that accumulated knowledge, but, not to sound rude, that does not make that person a certified or licensed trainer.
I actually was offended by what you posted. You said you respect the knowledge, but disregard it because they aren't a "certified or licensed trainer"? These are well-intentioned breeders who volunteer to engage with others on the Forum in an attempt to educate and celebrate this amazing dog breed. They share their knowledge. You don't have to agree with them. Offer your opinion and move on. Please don't suggest that their opinion, experience, and education isn't valid because they aren't "certified" or "licensed".
Your overall intent screams that you believe yourself to be better than the rest of us: "I'm a scientist with a PhD." Which puts the rest of us beneath you? In education and social stature? You couldn't know about anyone's socioeconomic status, educational achievements, or expertise on any subject. But you deemed to think it was appropriate to put us in our place. And that, was rude.
Even the analogy you offered is an indication that you don't value anyone who doesn't have a degree. Frankly, if you are hearing conflicting opinions about the same piece of art, get a third opinion. The person with the degree may have just scraped by with a C+, while the person who devoted decades may have been under the tutelage of a Master Artist. And really, if you are planning to purchase such a prized piece of Art, shouldn't you educate yourself so you can make an intelligent decision instead of allowing others to tell you what to buy?
As an aside: The original YouTube link remains, but we certainly do not need her entire catalog of videos. Sharing information is one thing, advertising for someone is another. I would hope that you understand that not everything you see online is true. Including claims to be an expert, certified, trained, Dr., etc., etc. Lots of people in the world are just selling a story.