That one story about being on stage is about the only one that stands up-one story! That's hardly a trend regarding Schwarzenegger's cunning. Very easy to make these stories up afterwards, knowing that someone like ND will totally buy into them.
Schwarzenegger has admitted to losing that show from back in the day, over and over again saying that he knew backstage before posing that he was beaten.
Well of course this is the Flex/Weider/Iron Age version; he could've gotten up if he'd had the balls so in fact, he wasn't up to the challenge, contrary to your interpretation. Interesting that he never talks about THIS story but has gone on and on about all the others that show him favorably. What a surprise that this embarassing chapter is almost completely off the radar in fact, just like those compromising Pumping Iron out-takes. 
Thats one story of Arnold's cunning? no there are more than that. ever watch pumping iron? see how he toyed with Big Lou? Serge Nubret? in 1980 he was telling jokes at the pre-judging just before Zane was about to hit one the mandatories so while Frank is laughing away Arnold is dead serious hitting the shot. stories of Arnold's mind-games are legend .
And I don't know of you're mistaken what Arnold said from his first encounter with Sergio in 1969 at the Mr Olympia with 72 ? but here is what Arnold had to say about that from his book
"Then, for the first time, I saw Sergio Oliva in person. I understood why they called him the Myth. It was as jarring, as if I'd walked into a wall. He destroyed me. He was so huge, he was so fantastic, there was no way I could even think of beating him. I admitted my defeat and felt some of my pump go away. I tried. But I'd been so taken back by my first sight of Sergio Oliva that I think I settled for second place before we walked out on the stage."
and maybe Sergio should have beaten Arnold in 1972 it would have made for a better contest in 1973 Arnold was steadily improving so it would have been interesting to see what happened.
And don't declare he wasn't up to the challenge unless you were personally there and witnessed the event because thats your fantasy taking over your logic , Arnold went to get up on stage and Jope stopped him , maybe it was because Arnold was going to get his ass handed to him , maybe it was for other reasons , who knows? I don't and neither do you so stop acting like you have inside information that no one else is privy to .