Even most of series 6 was pointless, they simply answered the last few episodes.
Nothing really makes sense still, there are so many things that stand out from any explanation. For every solid theory, there are many things that simply don't fit in with that answer.
There was so much that was simply pointless, why in purgatory (alt world) did Jack have a kid with the doc women?
Why did all of those guys have to wait for each other? Including Jacks dad who wasn't even on the plane? If it is purgatory, how can people like Sawyer, Kate and Sayid go to heaven when they were all horrible cunts in their real life.
The whole alt timeline thing just fucked it up, they started something they couldn't finish and it just doesn't make sense