[Xylakant]

> I like decreasing the number of cars, not forbidding them at all.

No one plans to.

That aside, cars also pose major problems to all those groups you mention. Elderly people feel unsafe driving and unsafe walking because of cars. They're the primary victims of car-caused accidents. Elderly people in bad health can also be a danger to others when driving.

Kids cannot go anywhere on their own - in large parts because traffic is a killer for them, too. This places a large burden on families, as the parents need to drive them everyplace.

Nearly all of the groups you mention would be better served if you'd remove cars and use the space to improve public transit. For example using dedicated bus lines - improving both speed and - more importantly - reliability. Or build tram lines.

[burfog]

With or without traffic, those groups do not feel safe out on the streets of San Francisco. They are easy prey for bad people. They don't handle the hills well; they might fall and break a hip.

Public transportation isn't safe either, even before the latest elderly-killing virus. Cars work. People too weak to drive can have family members drive them around.