I think an important thought is why now, vs. waiting 20+ years when the need of the train could be voiced by more locals. It could be useful for more high spee

I think an important thought is why now, vs. waiting 20+ years when the need of the train could be voiced by more locals. It could be useful for more high speed rail network to be built now while land prices are lower, vs. waiting until the users actually NEED the rail because the highways are too congested. This is similar to the situation in California where land is expensive, people genuinely need better transportation, and the project has gone way over budget. Is there a downside to building rail before people realize they even need it/would benefit from it?