I think if you only watch the original trilogy, Jedi are the good, pure, saviors of the galaxy and rebels of the established order and the sith are evil overlords who rule by their own design.

When you watch the original you see how the Jedi appear good and balanced, but over the trilogy become less focused on ruling by laws and more on feelings. Clearly bypassing their own laws as it suits those in charge.

Subsequent tv series continuously adds to that mindset that the Jedi were flawed, and sometimes outright dangerous.

I always saw the Jedi assuming the chosen one myth was about the Jedi becoming the absolute rulers so egotistical, they were destined to fail.

And as flawed as the new trilogy is, it follows that path, leading to Rey becoming a true balanced force user, neither Jedi or sith. And both have seemingly been destroyed otherwise. So Rey is really the chosen one