A train means being trapped. USA light rail has been run so poorly that no one thinks they can depend over the long term on rail. The trust in rail as a solution has been so greatly eroded, that people will always want to have a car as a backup. And since they own a car anyways (under this scenario) ...
But no one is trying to convince me that a plane should be my only method of transportation, and that a car is not needed. Further, I don't use a plane to commute, at least not at my level of pay :)