Raison d'etre of the Voynich?

[MarcoP]

 I came to this conclusion by noticing the text written almost flawlessly, therefore, the seemingly careless illustrations are no match and they had to be concealing something.

In addition to what Koen wrote, this is a "non sequitur". There is no reason to believe that poor illustrations in a carefully written manuscript are hiding something. A better explanation for this hypothetical manuscript is that the scribe and illustrator are two different people with different skill levels. Anyway, as Koen says, this hypothetical manuscript is not the Voynich.