Public transit in America presents a much higher chance of encountering dangerous people than a private car. Until those people are permanently, irrevocably, and definitively locked up, it would not matter off public transit were free, or even paid users to use it, it will not be a serious option. Nobody in my family is allowed to use public transit.
https://en.wikipedia.org/wiki/Killing_of_Debrina_Kawam
https://en.wikipedia.org/wiki/Killing_of_Iryna_Zarutska
https://www.cbsnews.com/newyork/news/nypd-men-pushed-subway-...