It’s funny: as an Australian that has visited the USA a couple of times (and never been to Europe), I’d repeat half of your points but for America rather than Australia. Some Australians certainly have large vehicles without good cause, but that number is nowhere near as big as in America. (Notwithstanding this, my Dad and I have discussed the concept of a ban or extreme tax on owning big vehicles unless you can justify why you need them (e.g. tradie or large family), with country dwellers immediately exempt for convenience.) And fuel is way cheaper in the USA than in Australia.