Exactly right, Stone Cold. I'm not asking for them to answer everything in a neat package. I don't need all the questions answered. I don't even need the answers to make a whole lot of sense. But, please, give us something more then "it's magic."
In Twin Peaks the answer to who killed Laura Palmer was her father, possessed by an evil, spiritual parasite called "Bob" that originated in a place of evil called "The Black Lodge" and fed on the fear, pain and death he caused out in the real world, killed her.
Now that may sound stupid written out that way, and it doesn't answer any questions about who/what Bob really was, How he came into being, what the black lodge really was, when or how he possessed her father, what, if any, his long term goals were, how he got his powers or any of a dozen other questions about the murder, Bob, the black lodge or anything else... But...
It was a great answer for the show and what they had built it up to be. it didn't answer everything, but it answered just enough for any genre fan to be happy and love the series.
Just saying "it's a magical light" or "a magical place" isn't an answer. Or it's not a very good one. Just drinking a glass of wine isn't a "big reveal" on how to make someone a "guardian of the Island", just having the mother say "It took care of it so that you will never have to worry about dying and can never kill each other" isn't a good answer.
At least give us a bit more.
That's why I haven't given up all hope just yet. The answer could take 3 minutes of screen time to tell us over the next 3.5 hours of TV and I'd be happy.
It could be as simple as:
"There is a grand design to the universe. Everything is connected to everything else. A butterfly flapping it's wings in China can cause a tornado in Kansas. The reason everything is so connected is because of this "spark" of life (energy) in all things. this Island, for some long lost reason, is a focal point for all of this energy that connects every living thing through out the world.
Ancient mystics called them "lay lines" lines of energy encircling the globe. they all meet here on this island. being so close to the convergence of all of these "lay lines" gives the island special properties. Amazing things happen here. Amazing coincidences. Healing energy. Special powers over fate and life itself. By studying and controlling the lay lines that converge here you can alter peoples fate and lives. But there is a danger as well. If this island was ever destroyed by man, or natural causes, then the energy would die out. the Lay lines would drift apart. there would be no more "spark". Life on Earth would end.
The MIB touched the focal point of the lay lines directly. He is part of them now. He can see people's pasts by studying their "aura" and back tracking their "lay lines". But with his connection to the lay lines he is now tied to them as well. if he leaves, the lay lines would split apart and the spark would go out. Ending the world. He has to stay here, close to the focal point or all is lost. it was up to Jacob to keep him here and keep the focal point safe. Now it will be up to one of you to take Jacob's place."
I just made that up off the top of my head and it would take all of three minutes to have "ghost" Jacob explain it to the Losties. And that would be fine and make everything all good in my books. it doesn't answer everything, but it explains a lot and and still keeps the mystery alive and doesn't contradict anything we've seen so far in the series.
All I ask is that they at least give us something like that. An answer, even a vague one, is better then just saying it is "magic" or "the mother made it that way."