IF this was true (which it's not), doesn't that make Lucas an incompetent filmmaker?

If, for 35 years everyone who saw his movie drew one conclusion (Only Han Shot) and he thought he tried to make the other point, isn't the fault HIS for being incompetent? Not the fault of the fans for 'wanting a cold blooded killer'?

Imagine if Orson Welles came out in the early 60s and said everyone was stupid for misunderstanding the ending to Citizen Kane. The shot should have been wider and shown that EVERYTHING Kane owned was named "Rosebud" and that he was a greedy obsessive bastard, not a tormented soul longing for lost innocence. Wouldn't that make Welles an incompetent loon?