Theory: perhaps the letters do not have phonemic content?

[oshfdk]

It is your responsibility to prove why I should believe that you are right and that the VMS contains some kind of mystical subtext  

No, it's not my responsibility at all. And I never claimed VMS contains some kind of mystical subtext. I never said it doesn't either, so I have nothing to prove.

As a counteroffer I suggest you try to create your own mysterious manuscript that would grab everybody's attention and then would resists all attempts of making sense of it for hundreds of years

With modern technology, it's not that difficult. Create a random set of letters, add a system to it, add some similarities with other systems, and (most importantly) Tell me you don't know where you got this book from.

With modern technology it's impossible. Exactly because the existing technology makes the process very easy, so not a single person will be interested in the result. If Voynich Manuscript vellum was dated to 1850, most people would have said "well, someone had a very strange hobby" and moved on.