Thanks! I did not mean to diminish "Star Wars" overall. I love "Star Wars." With the Joseph Campbell link, I think Lucas was trying to obscure his actual sources: Frank Herber's Dune, and the gospel story of the Bible.

This 1980 magazine article is the clearest analysis I've found on that point:

https://www.scribd.com/document/486160314/Jeff-Calkins-The-Empire-Strikes-Back-What-the-Critics-Didn-t-Tell-You