Voynichese is a numeric cipher?

[eggyk]

Overall, you’re right that a person is capable of anything, but it’s important to understand that, taken together, creating a single book cipher is incredibly difficult. And if we’re talking about a cipher (which means we’re implying the purpose of encryption), then we come to the point that complex ciphers are impractical to use because they’re redundant.
It’s the same as if you were preparing a culinary masterpiece for breakfast. You may want to do it, you may be able to do it, but your laziness will convince you to order a pizza...

Yet the fact is that many people still choose to create culinary masterpieces for breakfast. Some dedicate their life to it. 

For example, we can imagine a hypothetical scenario where someone decides to create an extremely difficult to break cipher, and write a book in the ciphertext. The motivation could simply be to show others "hey look, I encrypted a whole book! I guarantee you can't decrypt it! It's surely impossible". 

In fact, that's basically the exact same premise as You are not allowed to view links. Register or Login to view. today. It must take a lot of effort to craft these exercises, and it's also quite difficult and time consuming to solve many of them, yet they continue to be created, and people continue to try and solve them. 

Furthermore, an even better example is You are not allowed to view links. Register or Login to view., which has only been 3/4 solved by the best cryptanalysts in the world. To deliberately make something so unbreakable (yet made to be technically solvable) must have taken lots of time and effort, and people have dedicated years to solving it with limited success. In that case, using a difficult cipher was clearly part of the premise, as it was not meant to be easily solved. It's an art! 

The VMS could easily be a similar example; perhaps the length of the book is relevant to the cipher, or perhaps the imagery is used somehow, or it's made of different sections with different ciphers. I'm just speculating obviously, but hopefully you get what I mean.