Raison d'etre of the Voynich?

[hatoncat]

text written almost flawlessly

Compared to other manuscripts, the text of the Voynich is written relatively carelessly and would match the drawings in that regard. For example, the lines aren't ruled and words dance up and down. There are many examples of botched characters. There is variation in the way the same scribe writes the same character...

By careless, I think the definition of careless has less to do with the line's straightness that its legibility. In that sense, extra care was taken to ensure the letters could be read, however lacking in semantics it initially appears.