Where train networks are extensive, frequent, and reliable the ridership numbers are huge, orders of magnitude beyond what a road network of equal right of way could hope to support.

I have no issue with people choosing a car. I have issues where a car is the only choice due to the built environment being actively hostile to all other forms of transportation. Walking --> Cycle --> Train depending on how far you want to travel is far more sustainable and opens options for far more people than car-centric infrastructure where only a car is functional.

Building out a train network also doesn't mean we shouldn't also have a quality road network as well; there are plenty of long tail needs where a vehicle that can go direct point-to-point is very valuable. We just need to be building more than just a road network as roads alone simply cannot handle the needs all travellers.