We like *our* big cars because they're cheap, comfy, and easy to drive. With us, driving is a chore. If we had it our way, driving to work would require no more effort than an automatic toilet.
Plus we're a huge country with long, wide highways. If you lived in new york and wanted to visit you're relatives in L.A. what would use to get there? A crown victoria or a GTI? (and the vic only costs about $2000 more).