People (Men especially) think their status in life depends on their vehicle. They just can't get over the idea that bigger is not always better. It's how you use it that matters.
In all seriousness, vehicles have been a status signifier ever since they were created and everyone loves to say that they are better(richer) than the Joneses next door. Being bigger and taller than others is viewed as good in society and in vehicles.
Its not exclussively their fault. There have been years of propaganda from big auto corporations where the only way you can be a productive and resourceful man, is if you own a pick up truck. One truck commercial basically claimed if you buy their truck you immediately become more dependable, resourceful, and attractive, which ulitmately implied it would increase your chances of finding a partner.