[0] I loved Bob Ross.
[1] I originally had "Picasso" but the styles were too disparate for the point. Still, props to @krapp for the ERB link.
I can't resist: https://www.youtube.com/watch?v=WGN5xaQkFk0
I don't believe that one bit.
Also, I disagree with your assertion that artisans should avoid learning the fundamentals of their craft, or that doing so somehow robs the work of its "voice".
It reminds me of a fourteen-year-old guitarist who doesn't see the need to learn scales or music theory. "I'm not going to be some cookie-cutter musician, man. My music is going to be original and unique!"
This article would be much better if it had gone through an editing phase or two.
Scales can almost be self-learned and a good chunk of rock musicians don't know anything about music theory, and can't read music. Many excellent musicians and artists are autodidacts.
There was nothing wrong with the article as regards the "passive voice" and like most people who moan about the passive voice you likely don't understand what it is: http://languagelog.ldc.upenn.edu/nll/?p=2922
Mentioning that hilariously bad app Hemingway makes it worse. Running Hemingway through hemingway is fun - it gets mutilated.
(And the hemingway app is pretty crappy as far as natural language processing goes.)