Certainly not a surprising fact for me. Most people in this country, given where they choose to live, need cars. Living without not just a household car but one car for every driving age member of the household is, if not impossible, quite unpleasant.
Policies are in large part to blame for this, and this can be true even if you think typical car-centric suburban living is what most people genuinely want. People do make choices, but their choices are impacted by available options and their prices. With minor policy changes (transit, zoning and land use) you can leave in place car-centric suburbia while reducing car dependency. Your teenage children will thank you for it.
