All of that was because of only George Lucas.
Hmmm. "Only" George?
Don't get me wrong, I have a lot of respect for George Lucas, and I even believe he is a genius when it comes to telling an entertaining story. I also believe that Star Wars wouldn't exist if it weren't for him. I just cannot believe he brought even the primary success to Star Wars. He owes a lot to the talented people he chose to work with, and a lot of that was pure luck on his part.
Look at the paintings which Ralph McQuarrie made for the original Star Wars trilogy. Try to imagine all of the style and mood that he alone gave Star Wars. Without McQuarrie, Star Wars could have easily been a simple and cliché story of good versus evil, with none of the character we love today or the magic that pulled us in. Darth Vader's machine-like body and black suit was all based upon a Ralph McQuarrie painting. So much of the visual feeling of the film was based upon what he designed or inspired for Lucas, not the other way around.
What about the sound? George Lucas didn't invent or discover the sound that went to the lightsabers or many of the other amazing and classic Star Wars sounds; that was the great work of Ben Burt. The amazing music was written by John Williams, who was suggested to Lucas by Steven Spileberg I believe. Also, with The Empire strikes back and Return of the Jedi, he didn't direct the films, and neither did he fully write the story for either of the movies. George got lucky in so many ways you can't imagine.
George Lucas is a great artist, but don't want people to worship him (especially when he becomes extremely stubborn over silly reasoning). Whatever his skill, there’s no excuse for him to be so irrational at times. At the very least you shouldn’t be surprised when people get a little frustrated with him now and then.