Is It Really A Butterfly Effect?

According to the director's cut, Evan was never supposed to exist, and in the end didn't exist at all. So what was the point of showing us his "fake" life story if the changed he made didn't matter at all in the end. The only change that mattered was the last one he made; but all the other ones are essentially irrelevant to what Evan ultimately wanted to do. Even though the other realities made him realize what he had to do to spare the suffering of his loved ones, they really didn't serve any other purpose. This analysis is going off of the director's cut. But if you see the original version, it ends with Evan still being alive. And the fact that he's still alive gives meaning to the changes that he made to his different realities. But switching back to the director's cut --- and connecting this movie with the class --- I would say that this movie fits nicely because the "truth" is constantly changing.