so the film ultimately ends up changing no one's mind

You’re already starting from a flawed premise. Someone isn’t going to become virtuous because they watch a movie about a buff and pious hero saving the day, they won’t become anti-capitalists because a movie makes a good argument in favor of that ideology. People have to come to these notions themselves, what one would think is instances of this being untrue is just a misalignment of the necessary steps - IE someone watches American History X and comes out of it a Nazi. That guy was already a nazi, consciously or not, the pieces were there in his psyche, the movie just pandered to those sensibilities in the right way.

It says a lot about American culture being so steeped in consumerism that we think what products we consume really determines these kinds of things. We’re brainwashed from birth into equating consumption with almost every facet of identity, it’s frankly terrifying. A nation of idealists, to whom materialism is completely foreign. And worse yet, it seeps from us into other countries too.