Oh, I get where you're coming from, Michael. The sad thing is that they didn't trust Julia and Julia very well could have blindsided Cydney had they done the 3-3-3 thing. But if all the girls and Joe were on board, Debbie's 3-3-3 plan would have indeed worked. Probst reads the tie between Cydney/Tai/Scot, Tai plays the super idol to save himself, then Scot gets voted out on the revote.
Turns out Debbie might have known what she was doing all along.