LOST is actually a TV show with a simple storyline that becomes increasingly absurdly complex, like a Rube Goldberg machine. The purpose is to suck viewers in with a mysterious plot by never giving away a sensible storyline.

So this is not theory, but a criticism of the show.

Despite the shows allusions to philosophers and religions, LOST actually has the intellectual content of a sitcom, and its success is the result of expensive special effects, competent acting, and well paid writers.

It would be a fallacy to actually have a logical theory or truth to the show, because this is not the point of the show, rather the point is for viewers to trying to find the plot, which is half of the entertainment, but the actual "truth" behind LOST is meaningless.

Perhaps the actual truth is guarded so well because it does not exist because it is so empty.

Think about the episodes. Although the show tries to move fast to avoid it, the fact is, if anyone was trapped in a place with mysterious goings on occuring all the time, the one question people would ask the most is WHY. Why is there a monster, why are we here, why are the others kidnapping us...Unfortunately the question WHY almost never turns up. Instead, in an unrealistic way, characters appear constantly driven in the episodes to respond to various emergencies and events without much thought, as if they have no agency or ability to decide for themselves. Any intelligent person who experienced the island like the characters on the show would observe that it appeared that their actions were futile, because it appeared something else has power over them (the monster, "hallucinations", sailing in circles") and then would stop performing because they more or less realize their actions are useless, and instead start asking questions such as WHY and refusing to cooperate.

This becomes increasingly absurd as the third season progresses, because now the main characters are in direct contact with the others. A few WHY questions from the characters, "Why are you here, why do you want us, etc," would be the obvious logical thing to say, but this never seems to come up. This is because the premise is so thin that the plot could not withstand any satisfactory answers to a WHY question, and these questions are always avoided.