A peering into A, into B

Let it be known that Gozu won't be for everyone. This recommendation is not for a mass audience in the slightest. This is not Takashi Miike, filmmaker behind the modern cult hits Ichi the Killer and Audition, as you'd might expect. And yet, if you've seen these films, to an ironic extent, you should know what to expect. Gozu is a fabulous act of surrealistic tastelessness, a peering into filmmaker and screenwriter into what can f*** around enough in their psyches to have it blasted back into these characters here.

I'd like to know why a comma is missing after "screenwriter."
Thank you in advance for your help.