I think that's generalization, to be honest. The parent comment's intended (I believe) use of "car culture" implies anything that encompasses cars. When I wrote "how they're used and how the automobile infrastructure (roads/highways/etc.) is constructed", it was with respect to that parent comment's context.
In reality there are more purposes to cars. We shouldn't therefore apply some aspects of cars to the broad meaning of car culture.
In reality there are more purposes to cars. We shouldn't therefore apply some aspects of cars to the broad meaning of car culture.