I don't know if anyone has posted something like this, but i keep reading that all of you guys think FST is a happy result or ending for the losties...But, what if it's not?

I think FST is a reality where they sacrificed something they really loved...Kate sacrificed Aaron, Jack sacrificed Kate, Sawyer sacrified Julliet, Sayid sacrified Nadia, Ben sacrified Alex, Desmond sacrified Penny.

What i'm trying to say is What if they had to make a choice in the OT for the greater good and lose someone they really love?