Cars aren't the best option, but you can drop self-driving cars into an existing car-centric society one car at a time, with the car buyers paying for themselves.
Making a car-centric society meaningfully less car-centric requires the enthusiastic support of that society, along with competent political leadership, and probably a fair chunk of taxpayer cash too. Suburbs with huge lots make for long walks to the transit stop - but densifying those suburbs is not easy.
I don't own a car; I travel everywhere by bicycle and public transport - but the public transport I use was all built in the 1850s. Some time between then and now my society reorganised into a form that has a lot of difficulty delivering public transport projects.
This is a false alternative, because robocars do not exist, while public transit does exist but simply hasn’t been adequately implemented everywhere.
Politicians (and grifters alike) like to point to a future technology to solve an existing problem only to delay existing solutions which they don’t want to implement, most often for political reasons.
Robocars most certainly exist. They’re probably about 5% of car traffic in San Francisco. I’ve not taken one yet (taxis/ubers/Waymos are mostly impractical with a young kid in the US as you must use a car seat unlike in most European countries) but as a pedestrian they seem mostly a safer than other drivers. As a driver I expect they will eventually induce gridlock but the city can always create more bus lanes.
Portable booster seats are pretty small. I can’t see it working if you have a kid younger than the booster seat min though. Only a few states have strict rules here, Washington and California being a couple, although I think California has a taxi exemption.
The robotaxis that do exist only do so in very limited places using very expensive technology (including off-shored service center for intervention) that is not available for the public consumer markets.
In the USA where transit in most cities sucks? Seattle is supposedly one of the best but you can’t get to work downtown most days without being harassed by a fent zombie.
Surely, not until public transit networks covering literally everywhere regular roads can get you.
Public transit is better, but building it outside of dense metro areas to the extent it becomes competitive is probably even more difficult than building a self-driving car.
Making a car-centric society meaningfully less car-centric requires the enthusiastic support of that society, along with competent political leadership, and probably a fair chunk of taxpayer cash too. Suburbs with huge lots make for long walks to the transit stop - but densifying those suburbs is not easy.
I don't own a car; I travel everywhere by bicycle and public transport - but the public transport I use was all built in the 1850s. Some time between then and now my society reorganised into a form that has a lot of difficulty delivering public transport projects.