To be honest, abandoning the idea of “everyone can be a Jedi, you just need to believe in the Force”, with “believing in the Force” being a metaphor for “believing in yourself”, is something that happened in The Empire Strikes Back (and one of the reasons why I can’t consider it as good as Star Wars). So you may say that even the OT doesn’t follow Lucas’ earliest ideas (and the OT, while being better than the PT, is also more patchy IMO).

I also thought that The Last Jedi would return to that idea (what with dismantling the Jedi Order, Kylo talking about leaving the past behind, Luke talking about Darth Sidious (I never want to hear that name in any movie), and Rey choosing her own path, and, of course, the title of the movie), but the ending goes back to the state of the Star Wars galaxy at the beginning of Star Wars, which I still don’t get why (other than being the easy, lazy path for Lucasfilm, because everyone loves lightsabers). TLJ left me confused in a way no other Star Wars movie have done before.