No of course there isn’t an unified American culture, but there are people hard at work at destroying all forms of culture in the US.

Yes there is top down economic pressure and a lot of fedaral pressure, but it is also just people choosing to do things a certain way. Going out and buying a coffee instead of using their drip coffee machine or buying an espresso machine. Shopping at Amazon, Walmart or whatever instead of supporting local businesses.

Working against people who are trying to create better walkable/bikeable neighbourhouds etc.

Sooner or later the current iteration of the US will fall and it will probably mean that the entire country falls apart. In some ways or another state’s already function more like separate countries than in say the EU.