Have you been to New York? The subway is the mode of transportation for nearly everyone and it works great. I wouldn’t say cars are the successful mode of transportation in New York at all
The discomfort and cost of public transportation would be at least somewhat tolerable if there was anywhere near as much of an emphasis on timeliness as there is in, say, Japan. As it stands though, the public transport is the one thing I miss least and hate most about the city.
just to add some real numbers, we can look at the actual NYC subway data from MTA's march 2023 report[0] page 12:
* ~3.7m subway riders in march 2023
* 84.7% of riders arrived at their destinations within 5min of schedule
* 83.3% weekday on-time performance
* 85.6% weekend on-time performance
And for family groups the public transport is more expensive, even when including parking (or paying an Uber).