Creative Brilliance as a Genetic Anamoly

I had a thought a few days ago about how creative brilliance is a sort of genetic anomaly. Look at John Lennon, his father was just some shlub. His mother was eccentric and had some musical interest (she taught JL banjo chords and tuning), but neither of his parents were remotely "artistically brilliant." Lennon's kids have a degree of musical talent, but nothing compared to their father (and take also into consideration the artistic nature of Yoko Ono in Sean's case). It's the same situation with the late musician's partner Paul McCartney: McCartney's mother was a nurse and his father led a band as a hobby but neither is on record as being as remotely brilliant as their son. A couple of McCartney's children have gone into the arts, but none of them display the gifts of their father. Bob Dylan---his parents showed no signs they would sire a man who is the greatest songwriter of his generation. In turn, Bob's children show some artistic talent, but nothing like their father's.

I could give more examples but I believe those three illustrate this concept or idea that creative brilliance is a genetic anamoly. There are examples of the child of an artist being even more talented than his or her parent (Jeff Buckley, the son of Tim Buckley) but then we get into the murky area of "what is good art?" and "what makes a work of art better or worse than another work of art?" I think Rufus Wainwright is more talented than either of his parents, but you may argue the opposite. The cases I make in the first paragraph, however, I would like to think would be a challenge to refute.

How the hell does this tie into the American Outback or anything else you're doing?

Yeah, yeah, I know; stay on message, on brand, but that sort of thing bores me. Besides, the whole "brand" of the American Outback is about exploring the frontiers of "normal" life, that could include exploring this idea of creative brilliance as a genetic anamoly. It fascinates me, these people we accept as artistically brilliant who just pop up in their genetic line like mental mutations. Are any of the relatives of Van Gogh even remotely as gifted as the deceased painter? What about the family of Da Vinci? Why does it happen? Why does it only happen once?

Just a remind that I currently have six books for sale on Amazon ranging from fiction to non fiction to song lyrics (or poetry, if you prefer):

https://www.amazon.com/Books-Izaak-David-Diggs/s?rh=n%3A283155%2Cp_27%3AIzaak+David+Diggs