Sure, but you could have stoppers within the state to the capital, then a high speed interstate train, and then a slower stopper the other end.

There’s also transport solutions like shared car fleets the other end of the high speed train (in effect short term rental) so you make the inefficient miles be done individually, but the main leg with the high demand a rail one.

There are plenty of trips that could be made more efficient with sufficient will and imagination among transport planners