Even for flights which take 45 minutes in the air, I’d never expect to get to the airport, through security, through all the boarding and unboarding nonsense, and from the destination airport to where I was actually going, in 3 hours.

IIRC last time I was in Seattle airport, after I got off the plane (which was late, of course), I spent half an hour just walking through airport and to the rather inconveniently located light rail. Everything involving flying takes forever.

As some who used to travel for meetings quite a lot to a city 3 hours away by high speed rail, it really isn't. Once you take into account that you can show up for your train 5 mins before it leaves, plus the fact that the train station is almost always much closer to where you want to be, the difference in time between trains and planes pretty much disappears for shorter trips.

Plus the train is just so much nicer and more comfortable. It's quieter. Your seats are much bigger and have more legroom than even the nicest business class seats. You can get up and walk around if you want. You often have a restaurant car where you can sit and grab a drink or something to eat. Train travel is just so much more relaxing compared to flying.

You just can't do that in the US, outside some very select situations (like going from somewhere inside DC to Manhattan NYC). From SF to Seattle, how do you get to the station in SF? In Seattle, how do you get from the station to your destination? What do you do to get around in Seattle? Generally, you need a car, which means renting a car, which is really expensive. The US is set up to handle this at airports pretty well: you get off your plane and go to the Hertz counter and pick up a car (and then after your trip is over and you've returned the car, get arrested for auto theft when Hertz reports your car as stolen--don't use Hertz). I haven't tried trains on the west coast, but on the east coast, I've never seen train stations set up with rental car counters.