Eh, not really, but that's prolly a good enough description of it.
I'm trying to keep it simple, which is hard with a show like LOST.
Also, the finale very clearly explains everything (like you quoted). I don't understand why so many people don't get it (no offense to the OP, just a general comment).
I've gotten into quite a few arguments off-line about the fact that LOST sucks because they all died in the crash. It reminds me of that attrocious interview when the interviewer argues with Damon Lindelof (the head writer) that they all died in the crash. LINK
I really wish they could get someone who knows a lot about LOST, someone like me, to interview him for like an hour like George RR Martin can get interviewed and asked complicated questions about his universe. It would be more questions in how they came to certain decisions in the plot, plot threads that were changed, and what original outlines were, not to mention confronting him about actual stupid decisions.