According to The Daily Record, Friedkin says:
I had an opportunity to produce Star Wars. Francis [Ford Coppola] gave us the script at the time when no studio wanted to make it. [Peter] Bogdanovich and I looked at it and scratched our heads. I asked Francis if he was going to direct and he said George Lucas was. George had only made American Graffiti and I didn't think he could bring it off. Well, I was wrong. I guess I made a little mistake. But I did not know where the audience was going. Star Wars changed the business.