Alfred Hitchcock's Movies as Fairy Tales?

Film scholars have cited Notorious as a fairy tale form and the use of other fairy tale forms in the works of Alfred Hitchcock. I don't think it's one particular fairy tale, but that you could argue there are fairy tale elements embedded in it. There's an element of Bluebeard in the fuss over the wine cellar key--the key to a forbidden room that the heroine must enter in order to discover her husband's secret...well, one of them anyway. And I suppose her husband's domineering mother choosing to poison the heroine can probably be attached to at least half a dozen fairy tales with venomous, jealous queen/stepmothers. For example, Snow White is poisoned by the comb and apple. I find myself a little reluctant to attach those things to the extent of claiming Hitchcock "used" fairy tale forms, as the story contexts aren't necessarily fairy tale structures, it just seems to me that they parallel some elements rather than consciously utilizing them. Hitchcock's unconscious osmosis is another example of how ingrained fairy tales, and all children's literature, are within the human psyche.