The first palaeographers to assert the Ms is in a humanist script?

[nablator]

So do you really think it is a piece of nonsense? If so, how would you explain the hammering-like pattern behind? 

Do you know the image that looks like Marilyn Monroe in the distance and Albert Einstein close-up? The overall impression of a clean, very readable script might suggest a humanist style, but the shapes of the glyphs mostly point the other way, to some gothic styles as JKP explained.

If by "hammering-like pattern" you mean well-separated glyphs i.e. not cursive, this is mostly true, although there are some ligature-like combinations that are hard to interpret. That's Voynichese for you, paradoxes everywhere.