I think there's two confounding factors there, in the US parking is usually plentiful and right out front (or visible), so you're always seen in the vehicle you pull up in. It can be a part of your identity, both for yourself, and socially.
Americans also spend a lot of time in their cars, I went from a short commute to a long commute (1 hour each way), and found I got almost exponentially more critical of my car the longer the commute.
Suddenly the practical vehicle I didn't mind driving 15 minutes, was an eyesore to look at after an hour, and the NVH (noise, vibration, harshness) wears on you exponentially with time.
I started browsing cars to buy that would have been borderline financial suicide for how much I made, just because of how important the comfort and aesthetics became to me.
Couple this with their tendency towards financing things, and how cheap automotive related expenses are in the US, and it's the perfect storm.
I ended up changing jobs to one 10 minutes from my house, and it's downtown so parking is just done at various pay lots a few blocks from my office so nobody ever sees what I drive, and suddenly what I drive is irrelevant again, I was back to being content with my 15 year old Camry.