Cars tend to diminish quality of life. Local, walkable and cyclable neighbourhoods on the other hand enable people to flourish. When people have to travel by vehicle, trains and trams are superior to cars.
Cars are only diminish quality of life when there are too many in a given area. For every person along the way though a car is a greater improvement than no car. Sure each one harms the overall quality of life, but the individual is better off.
