I agree a little bit, but not much.
What I agree with - “it’s been wall-to-wall Sith vs. Jedi, “always there are two”, and “who are my parents?” ever since.” I think that everything was significantly handicapped, but not in Empire Strikes Back. It was partially The Phantom Menace, and then hard with Attack of the Clones. This was when the Jedi and Sith were standardized and heavily limited in what they could be or do, and Anakin/Vader was given a Chosen One status, not to mention the universe-shrinking with C3PO, R2D2, and Jango/Boba Fett. Further Expanded Universe stuff standardized the Force and turned it into a constant cycle where nothing ever changes and it’s blue lightsabers vs. red lightsabers vs. gray lightsabers forever. But that definitely didn’t happen in 1980, it happened in 1999-2004.

If we’re talking about surrealism, Return of the Jedi is arguably the most surreal and strange of the three. People complain about the droid torture room in Jabba’s palace, but that’s right in line with the odd, dreamlike feeling. “I am your father” is not a problem. There was no Chosen One prophecy yet, so there was nothing about Anakin or Luke that limited the storytelling possibilities for the rest of the universe.

As for everything else, I think that if anything Star Wars is still a big sandbox setting that can tell many stories. Giving the rules for how blasters and hyperdrives function provided a foundation for those stories. Star Wars is full of military sci fi stories, political stories, crime stories, adventure stories, weird mystical stories, and everything in between. There is plenty of strangeness and surrealism. You can fit pretty much any story you can think of within Star Wars. Just invent a new planet, set it there, and you’re good.