Earlier quoted context omitted.
Why do people push for rail Visit Japan (or these days China) and you will understand. This reminds me of people who say, "What's the big deal about electric bikes?" Ride one and you'll know. See what Japan and China are doing WRT rail and you'll know.
Given the difficulty and expense associated with going to Japan, perhaps you could describe it to us here using words.
The trains run very frequently, with reasonable fares. It looked to be completely sensible and fast to live in an outlying city and take the train into a larger one for work, whereas the idea of catching a commuter flight from a smaller outlying city into a major metro area in the US (or likely anywhere) is almost completely untenable -- too expensive, too time consuming, too irregular, and too much hassle.