So Daniel made mention that the Oceanic Six (and then some) are the variable in the equation. They have free will to change things and stop the plane from crashing. That’s great for them considering that they’re the ones that are probably going to cause the incident. Let’s just step back and look at it in a different way. Let’s say that Jack could actually stop the incident from ever happening and thus the swan will not be built and a button will not need to be pressed causing a plane never to crash. Let’s say that did theoretically happen thanks to the oceanic six. If the plane never crashed they would of never warped back in time to stop said incident and that would create a paradox and that’s a no no in storytelling. So, the incident must always happen, unless of course the writers have decided on paradoxical time travel, which would make LOST a little mehhhh.
History Abhors a Paradox.
History Abhors a Paradox.