Julie has to be able to change the story, she threw the rope to boyd in the well from a different point in time right?
Maybe but you could argue that it was always supposed to happen, that it was part of the “sacred timeline”
Time travel is iffy because the rules of whether you can go back in the past to change the present depend on whatever the writers want them to be.
Could also be some foreshadowing when Ethan was telling her in the diner how you can’t change a story that’s already been told.