I was originally against the authors take on Myth one as well, but then I considered that my perspective may have been somewhat different from the one they were actually talking about and I sort of incorrectly translated it. Maybe they were speaking directly against a much more harsh version of the 'each part of the brain does one thing' than we interpret it. Not as a 'the visual cortex handles most of our conscious sight' but 'the visual cortex only handles sight and all sight is handled by the visual cortex only'. That is much stricter and much quickly disproven. As someone with an interest in neuroscience, I have long since been exposed to evidence that would prevent me from ever considering the second idea as being the possible answer, but perhaps others have not. If we consider someone who has myths on how the brain works but has never taken as much as an intro psychology class and instead bases their opinion on what they hear in passing from others, such as news sources or daily talk shows, then it is possible some people have the second idea as their mental model for the brain.

If that is the case, then I do think the author has made a slight blunder because the audience who would read their article is unlikely to include significant portions of people who would've lacked the exposure needed to have that much stricter and more incorrect mental model, and thus the author could've done better to present the myth so as to not confuse it with the not as incorrect mental model of the brain that their likely readers have.