The California HSR has a lot of problems not matched in Taiwan. Firstly, once you get from San Jose to Bakersfield, then what? We don't have good public transit in LA, much less to Bakersfield. But even if the train went all the way to Union Station in Los Angeles, you'd still need to rent a car to get anywhere useful, or take Uber/Lyft. And same thing on the other end. What happens when you get to San Jose? You stil…
Have you been to Taiwan? All the problems you just listed exist but even worse. You think Taichung has better public transportation than San Jose?
Plus, Taichung is building a metro which will open mid-next year...