The real point is that the state is so popular, the average person is eager to associate themselves with the Golden State with stories of friends from past trips, or even seemingly cool abbreviations implying familiarity. In a way, the Escalade is similar. It has lots of fans, but not everyone can come up with the needed cash to buy one.
Herbert "Doc" Koenig is a security guard in the building where I work. He don't need no stinking badge (he has an ID card with a photo of his goateed visage and the word "Doc" under it) and he doesn't carry a pistol, mainly because he is one. But he does have a rapier wit that could disarm the most suspicious intruder.
It is surely irresponsible to insert significant, fictitious incidents into movies marketed as true stories. Besides which, James Brown's life story was about as dramatic as they come. If you can't turn that into a compelling movie without inventing non-existent shotgun fire, nobody's life story is safe.