You're relying on "preferred" to do all the work there.
There are plenty of contexts where cars are the only realistic mode of travel and then it isn't a matter of preference because there isn't any viable alternative.
It appears to me that the Court holds that riding in an airplane or car is a right (of travel) but that piloting or driving that airplane/car is a privilege.
But then you come to the context where driving it yourself is viable and hiring a private chauffeur is infeasibly uneconomical and you've got some trouble.