If it's already cheaper and less hassle to use cars on demand today, yet most people still own cars, could it be you misunderstand the reason why most people ow

If it's already cheaper and less hassle to use cars on demand today, yet most people still own cars, could it be you misunderstand the reason why most people own cars? Why will people start renting (driverless) cars, if they don't want to rent cars (with drivers) today?