Quality of life is lower due to less car ownership? Seems counterintuitive in several ways. One being less car ownership should mean less traffic. A bigger one

Quality of life is lower due to less car ownership? Seems counterintuitive in several ways. One being less car ownership should mean less traffic. A bigger one might be societies not built around cars, i.e. more pedestrian and bike friendly, less area occupied by parking lots, better public transport, etc.