The 'Chinese' Theory: For and Against

[Jorge_Stolfi]

And it is also the only theory that offers a plausible explanation for why the book was created at all...

A book doesn't have to come from China to make sense. If a doctor wanted to document their knowledge but didn't want to disclose it, why couldn't they write a book?

That explanation stops being plausible as soon as you try to flesh it out.

Why is there no visible connection anywhere with European medicine of the time?  Why would he encrypt all the text with such a complicated method that not even the NSA spooks could make a dent at it?  If the book was for his own use, why would he draw all the nymphs? If he was a medical doctor, what precious secret knowledge might he have about the stars and the Zodiac? If it was about which remedies or organs were associated with the planets, why isn't there a single detail that suggests these connections anywhere in the book -- no astronomical references in Herbal or Bio, no herbal or medical references in Astro/Cosmo/Zodiac?  

And on and on...  The same difficulties arise when one tries to flesh out most other "why" theories, like "secret society" or "defraud a rich guy" or "invented language"...

All the best, --stolfi