I think you are way to short sighted on this.

Itd been proven that local access to transit systems pushes populations to other areas.

Like in California (where its too many people in the main bay area and LA). The incentive is to have other larger towns and cities across the I-5 absorb more of the population.

Which is happening, when Caltrain was established people started to move further south of San Jose. When bart finished their line further into the suburbs the home values for Brentwood went up as people bought homes knowing they have transit systems.

If the high speed rail completes people will move further out for cheaper homes.

Folks keep thinking trains don’t alter populations are not seeing the bigger picture.