Usually the high speed rail would be preferred in trips less than 2 hours. I prefer HSR than air from Boston to NYC as it takes me right to the city center without spending the expensive taxi bill (and frills you get more than you bargain for) or being robbed by UBer drivers. The air planes take a long time for takeoff / landing. The HSR here is not really high speed.
many HSR operations, most are not making money for a long while. China
is different as the population density and the under-developed in
air/highway systems (even substantially improved).
It is politically incorrect to hire Chinese for HSR, but we all have to face reality.