> planes are many times faster than trains
California's HSR trainset requirements specify sustained 220MPH.
Your statement applies to the current dysmal US freight-prioritized train situation, not any respectable modern HSR implementation.
A modern HSR in the USA not shared with freight should have no trouble beating ~500MPH air travel door-to-door. It should emit less co2 and cost less to boot.
Plus good luck affording an entire room with a bed and private toilet on a plane, that's private jet amenities territory.
Observation and dining cars are also nice experience enhancers trains easily offer but planes can't afford the space for.