Over half of New York City households are car-free. That jumps to 3/4 in Manhattan.
Millions of American households don’t have a car, but you rarely hear about it as a viable option.
Because as soon as you leave a major metropolitan area, not having a car is almost a nonstarter.
"the best public transit in the densest US city barely manages to reach 50% of car-free lifestyle" is what you're leaving out.
I would argue that even in NYC, having a car is necessary if you ever want to leave NYC (and you will want to).