When you break it down there's a lot of parallels despite those elements being used in different ways: big battle on an ice/salt planet, chase through space, Jedi mentor on a distant planet, betrayal by a new character in/met in a glitzy planet, reveal/non-reveal of parentage, but on top of that you have Luke's arc going from disillusioned mentor to learning from failure and facing your mistakes, and the 'force is for everyone, not just a few genetic lineages' with the casino planet epilogue.