[throwaw2934238]

People who live in big cities and ride crowded public transport every day to work, do not want to spend their free time on the weekend riding crowded public transport in the city.

The cars are used to get away from crowds and from the city, to have some privacy and comfort and go out into nature.

[nomel]

If the intent was to be green, to minimize your carbon footprint, then you would buy an older, pre-owned, small displacement vehicle instead.