Well for rural people, such is not an issue. It is ridiculous, especially given global warming, that urban masses when traveling locally are travelling individually in vastly heavier machines that require greatly more energy to do so. But expected, given the several decades rise of automobiles, decades of infrastructure built for car transportation, and consequent way urban areas have been greatly spread out far beyond human walking distances. So change at best, can be a slow transition.
That noted, there are many people driving heavy machines that only do so because of social status, their psychology preference for largeness, and or safety of traveling on lethally dangerous roads dominated if hit by other large mass machines. Personally, as not a car enthusiast, I'm fine in small ugly but functional, individual transportation vehicles. In the future, people in large urban areas could own/rent far smaller machines for local urban transportation and rent larger vehicles for occasional longer trips and vacations.