Because that’s not true. Cars are expensive compared to transit everywhere, but especially so in NYC. This was studied a lot before congestion pricing was implemented and only something like 2% of poor people were going to pay congestion charges. This did not stop a bunch of rich suburbanites from using them as a prop to demand that the city subsidize their lifestyle at the expense of NYC taxpayers, of course.
https://www.cssny.org/news/entry/the-cost-of-killing-congest...