To be fair, lots of American media has rebellious motifs, but its mostly merely product packaging and doesn't really reflect American society.

I lived in the US at one point and while repetition of various freedom themed polemics was extremely common (it initially got annoying, until I learned to simply filter it out), I didn't really find the whole thing convincing. It felt more like posturing.

That being said, there is a lot of American literature, cinema and art more generally that is truly non-comfortmist.