In just about every endeavor, there is a certain amount of "gold rush" fever. People are passionate about what they are really interested in . . . so much so that it can become all consuming endeavor to find deeper meaning. In historical context, people left their families, jobs, home to rush to areas far away on the prospect of finding gold or silver or a better opportunity. For the vast majority of those, these journeys were fool's errands, for the only people who got rich in these fevers were the suppliers of mining equipment, food and shelter.
So was LOST's main characters involved in a fool's errand of their own?
A sense of survival, to rescue, to friendship, to protection, to redemption - - - all seem to be worthy of all consuming passion and intense enlightenment.
Did the characters actually have to "survive" on the island?
Did the characters really need to be "rescued?"
Did the characters have real friendships or merely truce by convenience?
Did the characters have to protect each other from the unknown?
And did any of the characters actually redeem themselves?
It is really a harsh analysis because in the final season, the story line changed so dramatically to put everything before it in question. The Jacob-MIB backstory put a supernatural god like control over everything that happened on the island. Though Jacob said he gave any visitor "free will" to make their own decisions, but at the same time Jacob and MIB were constantly manipulating the characters - - - attacking their fears, personality flaws, emotional states and desires. Some could say that the island was training human circus animals to perform surreal plays for the gods amusement.
If the characters were trying to find their own souls, to reform and redeem their past sins, did they actually find that gold? Not really. The island ordeal was a harsh existence with many deaths, psychological breakdowns and inconsistent alliances. The real miners for the golden ticket was Jacob and his smoke monster buddy (who we learn is not actually his real brother but some supernatural shape shifting spirit being).
It seems that only Jacob and the smoke monster could "survive" on the island. They were both trapped on the island for reasons not really understood. They get bored with each other, and bring inferior humans to play a game of survival without rules. And when they don't play to the violent nature expected, the captors send their wrath upon them.
It also seems that Jacob and the smoke monster were the only ones who really, truly needed to be rescued from their immortal prison. The survivors really had no lives to go back to, as Jacob told them bluntly. They were picked to come to the island because of their various deep rooted faults. They were castaways from society before they even crash landed on the island. It was MIB who desperately wanted to find a "loophole" to get off the island - - - which probably was as simple as getting some stupid fool to accept the responsibility of becoming the next imprisoned guardian (which mirrors Desmond leaving the Hatch confines when Locke found him).
Whether Jacob and MIB were actual "friends" is debatable; but at least they were held as equals in their own minds, which is the foundation for any friendship. Though presented as being immortal foes, one does not get the sense of real anger between them - - - more a resigned sigh that their confinement is never going to end. It was only when Ben killed his mentor, Jacob, did MIB's fake blood boil as he burned Jacob's body. But we still don't know if that was a real death, or part of the loophole catch to make the other candidates believe someone had to step up and take Jacob's place (thus opening the lock of their island cage). MIB's performance convinced Ben that Flocke was truly evil and had to be stopped . . . . but from what? It was all an elaborate con on the humans to get them to act a certain way - - - to kill each of the immortals by sacrificing themselves in dangerous situations. What right minded individual would do such a thing? In the past, no one did (which frustrated MIB to no end).
Jacob and MIB did not need protection from each other because they were island equals. The only rule was that each could be killed (released from bondage) only at certain times and in certain places at the hands of an inferior human being. There was no redemption in Jack, Kate, Ben or anyone else killing off Jacob or MIB. It really did not solve any of their personal problems. It did not make their world a better place. All the finale did was release Jacob and MIB from their island hell. (Some could say that the island experience kept the characters spirits linked as one to be reunited in the after life, but others would say that is just a Hollywood trope happy ending with no logical connection to the show's own mythology).
No, the only true "winners" in the series were the two characters with the least scene time.