I Am A Real Werewolf

From what I know, there are different views on the veil (hell, when I originally learned of it it was under a different name). I will go over what I was taught.

Ultimately, it puts a sort of barrier between the mythic elements and the physical elements of reality, among other things. As a result, there are less supernatural beings that can interact in the physical world, they tend not to be able to use as much power, magic is weaker, etc.

As for why certain beings like werewolves, vampires, etc. are, primarily, on the physical side of the veil, I was taught it was because that is the more "base" nature.

Werewolves, vampires, etc. are, ultimately, more natural than mythical as a base (regardless of how mythical they are), and thus end up on the physical/natural side of the veil. If the "base" of an entity is more mythical, they would tend to reside on the other side of the veil.

Also, you say that the veil was created to protect humans from supernaturals and vise versa, but do we actually know that? Hell, do we even know why the veil exists? Like what caused it and the purpose? I mean, we might be able to extrapolate reasons, but I haven't seen anything that shows we know the actual initial intent.