The force is 90% ESP and is a minor part of the story told. Luke’s journey is mostly to become a warrior to defeat Vader and the Emperor and then Luke makes a twist by sacrificing himself to save his father and his father kills the Emperor, sacrificing himself in the process. Luke’s main story is not dependent on the force, but on his own character.
Not true at all. The Force is integral to Luke and his story. It is at the philosophical core of the series. A power that connects every living thing on a deep and spiritual level. A power that can be used for good, to help others, or for evil. Luke’s story is about using that power with responsibility. By sacrificing himself, he’s trusting in the light side of the Force, in the belief that love and care for others will save the galaxy. When Vader makes his sacrifice, he’s choosing the Force, giving into something greater than him.
It’s telling that even in Rogue One, the film that’s possibly the most sci-fi of the series, the Force still plays an important role.
The Force is really the religion in Star Wars. It provides the moral compass for the characters. That is especially notable in Rogue One where it is a matter of faith, not special abilities. Tarkin even calls it a religion in ANH. Take away the ESP aspect and the core story remains unchanged. I’ll agree that the light and dark aspect of the force is integral to the story, but the powers used are not. Take away the powers and leave it as a religion and the story is little impacted.