On what grounds?
Often elderly people’s driving skill deteriorates before they realize it or they are unwilling to accept the loss of mobility, putting themselves and other people on the road at risk.
When elderly people do accept that they won’t drive anymore, in a car centric society they are suddenly dramatically hindered in their ability to lead a normal life. They become much more dependent on constant care and attention, and are often forced to move into a dedicated retirement home, further alienating them from their life-long communities of institutions and friends.
Places where it is possible to walk to the store, walk to visit friends, walk to the subway station, walk to coffeeshops and restaurants, walk to concerts and museums, etc. are much better for the elderly than suburban sprawl. People can remain independent much longer, because there is more available community infrastructure nearby.
Additionally, maintaining a routine with a decent amount of daily walking is very beneficial to people’s health.
They’re terrible for school-age children, the disabled, the drunk, the elderly, the poor; terrible for commuting solo to-and-from work in rush-hour traffic (causes huge anxiety for commuters vs. other types of commute); and terrible anywhere with high enough density that air pollution and traffic get concentrated.
Additionally they are a hugely inefficient use of a society’s capital and energy/carbon budget vs. other modes of transportation, tend to lead to municipal planning which is hugely inefficient and environmentally destructive, and crowd out other modes of transportation leading to horribly slow and indirect bus routes, etc.
Finally, they are tremendously dangerous, one of the leading causes of death among young healthy people.