In Transformers: Dark of the Moon while on a tour of Earth, Optimus offers Sentinel the Matrix of Leadership and Sentinel declines, claiming it more fitting for Optimus since he knows the planet and people of Earth better.
Later, we discover that
Sentinel betrays the Autobots in favor of a Decepticon alliance, intent on bringing Cybertron to Earth.
Why doesn't Sentinel
take the Matrix of Leadership, weakening those he knows he'll be opposing, gaining the power associated with it and preventing its presumable destruction along with the Autobots as planned? Surely, there was to be continued life after the story’s action which could have made having the Matrix valuable and useful... particularly in dealing with the Decepticons.
I've seen this question in other forums, but never with a well-formed, logical answer. Perhaps there isn't one, but it seems too simple to say it was poor scripting or some illogical emotional bond that doesn't seem to remain valid throughout the movie.
Was there some technical reason for the refusal, like accepting the Matrix of Leadership would have prevented him from acting as he did?