Even in California there are flights every 45 to 60 minutes from SFO to LAX, OAK to LAX, SJC to LAX and all the other airports in the LA Area (John Wayne, Burbank, etc). Flights are always on time, are cheap, and fast. There is going to be almost ZERO demand for the “high speed rail” from the Bay Area to the LA Area. Who wants to make 10 to 20 stops between the two areas? And every year, “fast” gets redefined to less fast than the previous year. It’s a $100 billion boondoggle.
People always ignore the hassle of TSA for flights. Adds lots of time, and the shorter the flight, the bigger percent of time spent on Pat-downs.
Trains you get right on. No extra time for examination and all that BS.
Who wants to stop? All the people going to those points. It doesn’t take long. Most stops are 3 minutes at a platform.