I love your naive hero worship. Suddenly you get Sheryl Sandberg on and all your problems are solved. Hint: Sandberg is not magician and not even that competent all rounder or polymath. She was recruited in FB because she precisely knew how ad business works and brought huge network of big players in this space with her. In a way its backstabbing to your previous employer but well who cares. Another thing to think about: Its almost exactly 10 years since Sandberg is at FB and its still one trick pony. In fact, much worse than one trick pony that Google is.