It's not. When he was pitching in the Fall League his command was bad. You aren't going to just regain that over night when you haven't pitched in a year and a half. Even if he destroys ST, which is not full MLB lineups anyways, AAA will give him much more flexibility to refine his mechanics and build his arm up. Also innings limit
Even if none of those things were a factor and he is super human, we get a year of control back if we keep him down there a month.
There is nothing physically wrong with Cease and he isn't coming back from TJ. They aren't comparable.