Three of the best public transit systems in the world are Berlin, Tokyo, and New York, which are both amongst the densest large cities in the world (Berlin is almost exclusively 5 story apartment buildings). The Berlin subway is largely self-supporting without public subsidy, Tokyo's system is composed of two competing but interoperable systems, the larger of which is privately run, and New York's system was privately run until 1940. The lifestyle, weather, and zoning of the cities where it works kickstarted the construction, and there exists enough demand that they would have great public transit systems even without government initiative.
What matters is if the 82% of Americans who live in cities are forced to crawl through sprawling car-choked landscapes, or are able to live in a walkable environment. High reliance on cars prevents the latter.
By the way you were wrong about that Japan vs US comparison as well. USA has a higher proportion of urban residents than does Japan. And they have plenty of trains in Japan.
Yes, I'm guessing that many of those urban areas are within half an hour of a freeway--though this may be less true in the West. But the vast majority of those 82% don't live in places that are remotely walkable.
According to my Google search, Japan's urban population is 90%+. The US is around 80%. That's why I mentioned the two places.
/s obviously.
God I hate the responses on threads like this that insist on the impracticality of public transport worldwide because it doesn't work in the US. It's like mass Stockholm Syndrome or something!
Notice how I even said "it works in places like Japan"? Notice that? See it? Good. Now quit acting like like you're being oppressed every time someone mentions the US. Yes, the world is a big place, but guess what? The US exists and a lot of people live there. Deal with it.
Jesus christ it's like I insulted your mother or something.
Public transport only works inside of cities, and there's a lot of infrastructure already built to support sprawling metropolitan areas where everyone has 1/4 acre of land surrounding their detached home. There's not a lot of push to tear all that up and forcibly relocate the residents to inner-city apartments.
You know the benefit of electric, self-driving cars, though? An intelligent car isn't going to run you over on your bike. Be happy about that.