And intrinsic vampire lore would be... what, exactly? Because Nosferatu is as influential a vampire movie as they come (and the 'die with sunlight' idea is only the most obvious example).
But vampire lore is centuries older than motion pictures. And the foundational work of all modern vampire fiction is Bram Stoker's Dracula
, which predates Nosferatu
by a quarter century (after all, Nosferatu
was an unauthorized adaptation of the book with the names changed to avoid a lawsuit). And Stoker's Count Dracula is able to walk around in daylight without burning up or disintegrating or whatever. He just prefers the darkness.
"Intrinsic" means essential, part of the fundamental nature of a thing. If it were intrinsic, then it would be impossible to tell a vampire story without it. But Stoker told his vampire story -- the
vampire story -- without it, and so have others (including, let's face it, Stephenie Meyer). Thus it is optional, not intrinsic.