Wasn't this show originally some sort of survival drama?
The plot: A bunch of people get stuck on an island, weird **** happens. Then the entire series involves unfolding the mystery of what exactly is the nature of the island, and about six dozen sub-mysteries. ("What is the nature of Hurley's numbers? What happened to Walt?")
But Actually ...
The thing with Lost is that fans didn't just assume all the mysteries had an answer -- they were explicitly told so by the creators.
In a 2005 interview, co-creator Damon Lindelof said: "Every mystery that we present on the show ... all of those are questions that we know the answers to." He also said that "nothing in the show is flat-out impossible" and that everything so far could be explained by science. Sure, he was talking in the present tense -- but the present tense included the Smoke Monster, who ended up being the ghost of a 2,000-year-old guy who can impersonate dead people, and Michael's 10-year-old son, Walt, displaying supernatural powers that turned out to be ... actually, we have no idea, because that was never explained.
"WAAAAAAAAAAALT!!"
Fortunately, some of the writers have been a little more up front. You know the sequence of numbers that kept recurring in the show? The numbers that seemed to have so many mysterious influences (from making one man win the lottery to causing a plane to crash) that an explanation seemed almost impossible?
Season 1 writer David Fury (there's that guy again) says he has no idea what "the numbers" meant, and he's the one who came up with them.
"I was too busy practicing my comb-over to pay attention to my writing."
Hey, what about the early episode where characters hear mysterious whispering in the jungle? Let's again hear what Fury said in an interview:
"I can't tell you what they are now, but I can tell you what they WERE. They were supposed to be the Others, lurking in the jungle. At that time, we hadn't yet settled on what the Others would be."
Well, what about that episode that implied Walt could summon animals, and even made a polar bear appear on the island after reading about one in a comic book? Fury says:
"That was the intent. But then ... things have changed since my time."
OK. Well, how about that Smoke Monster then?
"There was no mythology to speak of in place during the early episodes of the series. We were building it as we went along, discussing possibilities. ... Some thought of it as a monster of the id, much like in Forbidden Planet -- that maybe it appeared differently to everyone who saw it. The most tangible thought, as explained later by Rousseau, was that it functioned as a security system set up by the island's creators/early residents ... whatever we later decided the answer was."
Whatever, indeed.