I think the last couple of sentences in the article are critical. We're not all blessed with equal abilities. We're not all destined for art school or to be the next Picasso just as we're not all going to be the next Bach or Tiger Woods. And for many of us, practice doesn't do squat in some realms. Well, genes can account for high, average, or low muscle tone, but that's not mentioned here, of course.
Artistic ability is also quite a bit different than physical, music, or math abilities. Art often involves much more spatial ability than other fields and sometimes more the intersection of the arts and sciences than someone who is physically gifted. Artists need some technical skills in creating, but they don't necessarily have to be an Edison or engineer type.
No mention either on how arty types tend to marry those who at least appreciate beauty or have some other attributes that arty types value.
