What if Lucid Dreaming is really just an illusion?
What if we are only dreaming that we are lucid, but are only following the role of the dream. Which sometimes happens to be the awarness of dreaming.
Maybe this could be why sometimes we become lucid and other times don't. And for newbies, they have a hard time at first because their sub-conscious takes time to adapt to the concept but they're urging for one until the sub-conscious agrees to perform one.
Therefore we arn't really in control but only perceive the illusion that we were or are at the time of the dream.