'Improving' car-oriented development has been observed to make things worse:
> It is a paradox in that improvements in the road network will not reduce traffic congestion. Improvements in the road network can make congestion worse if the improvements make public transport more inconvenient or if they shift investment, causing disinvestment in the public transport system.
* https://en.wikipedia.org/wiki/Downs–Thomson_paradox
Improving things for non-car users can actually make things better for drivers:
* https://www.youtube.com/watch?v=d8RRE2rDw4k
If you can't imagine how public transport can work in a big city, just try to visit a big city where it works (there are plenty outside the US). Seems more constructive to me than being extremely vocal about how you think it cannot exist.
For example: most car oriented American suburbs simply require a car for anything other than visiting a neighbor, whereas in a transit oriented city you might use transit to commute to work, but be able to walk to some local shops and services.
I think many people who are familiar only with car dependent lifestyles make the mistake of imagining a car-free lifestyle that involves replacing all of the car trips they make one-to-one with bus or train trips, which would indeed be really cumbersome, but isn’t really how things work (at least in my experience growing up in a rural small town in the US and having lived in a couple of European cities and NYC).