A) society is not planned by a god that sees the most optimal path and picks it, it works like evolution tweaking and building and slightly shifting what came before it. Do you have a viable plan for convincing 7 billion people to give up their cars without literal revolution in the streets? No? Then guess, what, cars might be part of the future.
B) from a basic ablist standpoint how are you going to get a frail 90 year old woman from the train station or her house without using a car? On a special bike with extra suspension and an enclosed carriage and a motor to haul all of that? Oh look you’ve designed a Pontiac Aztec!
Should we all use trains? Yes. Should we all support the government buildout of more trains? Very yes. But it is flat out dogmatic to the point of absurdity to suggest that the future of transportation will not involve electric cars? Absolutely.