Please quote me some dialog where this is stated.
It's not stated in dialogue, but rather in a production memo from Dorothy Fontana protesting the revision of the seduction scene in "The Enterprise Incident," quoted in an extended footnote on page 246 of the Ninth Printing (September, 1976) of David Gerrold's THE WORLD OF STAR TREK.
Fontana writes: "Sc. 93---seduction scene---Spock and Commander. Vulcans and Romulans have been firmly established as cool, unemotional creatures. True, Spock is half human---but only under the most extreme circumstances will he behave in any manner other than Vulcan. We have established that Vulcans do not nuzzle, kiss, hug or display any other form of
human affection. The Vulcan outward sign of affection is expressed in a certain touching of hands as demonstrated in " Journey to Babel." If Spock behaves in such outlandishly human manner as is indicated in this scene, he violates the character we have established for him and the culture he comes from. And the Commander had jolly well be suspicious if Spock starts slobbering all over her. Their seduction scene should be cool, suggesting an alien sexuality---but
not human passion."
So, while this statement is from a production memo, and technically not canon, it is from the writer of "Journey to Babel" and "Yesteryear," and shows her thinking on the subject, and in light of this note, hence my comment 26 days ago that Dorothy Fontana must be spinning in her grave.
No, it doesn't contradict
canon, whatever definition that term has on whatever particular day of the week you choose. It does contradict intent and previous characterization and behind the scenes lore. Now, whether SNW creators should take into account production discussions of 54 years vintage is another question entirely.
For my credits, they can do as they like. My only care is whether they execute their ideas well. I consider myself a post-Canonist. Canonical status is not a guarantee of whether an idea or interpretation is an intelligent one.
Again, I am stoked for this series. Only a couple of bits of pre-release publicity have given me pause, but not enough to derail my enthusiasm or turn me into a deranged hater. If I can survive "And The Children Shall Lead" and "Plato's Stepchildren," I think I can deal with whatever curveballs SNW tries to throw at me.