Because the public is brainwashed and you can't just shake them awake or you risk chaos. People will fight to keep their reality intact. Doing it this way, makes people feel like they are waking up themselves, not having a narrative pushed on them.
In the same vein, it'll give a sense of ownership to the "revolution". People wouldn't cherish freedoms the same way if they were just given to them.
Because the public is brainwashed and you can't just shake them awake or you risk chaos. People will fight to keep their reality intact. Doing it this way, makes people feel like they are waking up themselves, not having a narrative pushed on them.
In the same vein, it'll give a sense of ownership to the "revolution". People wouldn't cherish freedoms the same way if they were just given to them.