I disagree with many points you make in “Mistake #1.” Firstly, a writer does not need to understand about Jungian archetypes to write a novel. I say this as a retired psychotherapist: you just do not need that information. Jung did not invent archetypal figures as they appear in the history of human storytelling. He merely named and discussed them in ways that fit with his views of human psychology, which also spill over into the borders of the spiritually mystical, as he believed in something he called the Collective Unconscious, which is a theoretical construct with no basis in physical reality. Personally, I love his work, but I would not ever say that a writer must understand about his archetypes in order to write a book, because that is a very deep and rich part of his theory that I dare say most people claiming to understand, understand only very superficially or not at all.
Secondly, whenever someone makes a statement beginning, “there is a lot of evidence in neuroscience that …”, I want to see their sources, which I tried to do. Your link goes to another blog site, from what I can tell, that is not a neuroscience site. Also, the article is no longer there. I would like to see the “lot of evidence”.
Thirdly, none of what you say about “three-act structure” is relevant to Modernist or Post-Modernist literature, which is much of what’s being read these days outside of genre fiction. Additionally, some of the best genre fiction I’ve read lately leaps right out of a traditional narrative structure, which keeps it lively, challenging, and interesting. You seem to think that readers cannot cope with anything but what they expect to see happen, structurally speaking. I would say many readers would (and do) find that a crashing bore.
I still read traditional narrative, but not solely. None of my reading friends read only traditional narrative, either. Also, there are many ways we have diverged from Aristotle’s “Poetics” since he wrote them, and ever since they became available (giving birth to literary criticism as a form), critics have diverged on their opinions of his ideas. Generations should be free to invent their own forms and to experiment. What you seem to suggest is that everyone should write in a prescribed fashion, which is just death to literature (and the arts generally, too, in my opinion).
I do not read a lot of “expert” internet writers on writing, because of these types of comments you have made, which I think are misleading. I read this article only because a friend sent it to me. I think many of your points (other than the first) are valid and useful, when it comes to marketing information. But perhaps being a great marketer is different from being a great novelist. Many literary-award winning novelists would not fit within your constraints.