BINGO!
The problem with Star Wars as a setting is that the super-important, universe-shaking events have nothing to do with your player characters. Unless you are willing to make major changes to canonical events, the closest you can come to bringing your PCs into the action in the movies is allow them to meet and possibly aid the characters from the movies.
Players in RPGs expect to be a major factor in the campaign world, and this is hard to do in a setting in which the majority of events are published/filmed/etc.
There are, of course, ways to run a Star Wars game that doesn't touch canon, and that's to run a non-Rebel, non-Empire game (if you're playing during the Rebellion era), such as a group of bounty hunters or smugglers. Or during the Prequel era, Jedi on the fringes of the Republic, or as above, bounty hunters or smugglers. But honestly, if you're not going to use Star Wars canon and events of the movies (and to a lesser extent, the official novels), why run a Star Wars game at all?