Could the Voynich Author Be a "Ramanujan-style" Anomaly?

[ololololo]

However, Bio/Balneo is clearly a continuous text, not a set of separate entries to be accessed in random order. There are no section headers or marginal notes that would tell the reader where he should start reading to get the information he needs.

That’s exactly what I meant. But compare encrypting 20 pages to encrypting 200+ pages. I think there’s a difference, don’t you? In this form, it’s no longer an appeal to quantity, because 20 is still within the realm of human capability, no matter how complex the cipher might be. 
In addition, you can see that the handwriting is consistent throughout Quire 13, but it is sometimes careless and seems “hurried”. This tells us that there was someone who was willing to write so much text. 
The authors of the Herbal and the Astrology texts wrote short excerpts; the scribe of the Herbal B, by the way, also wrote quite a lot (But I assume that this is the author of Astrology)