I don't really have anything against cars in principle. There's probably going to be areas that are just infeasible to service with trains or busses for whatever reason, and anyone living in them could certainly benefit from a personal vehicle to move themselves around, if only to the nearest public transport station for the rest of the journey. I imagine trucks will likely see a decent amount of use in urban areas too for moving bulky/heavy goods to their destination, anything that you couldn't reasonably expect someone to try to fit onboard a bus or light rail or is too heavy for people to reasonably carry on foot from the nearest station really.
I personally feel like the car problems really start when you start building stuff in a way that people feel that they need a car in order to thrive. That's when you start getting things like every household in your cities wanting their own car and parking spot(s) to keep it in, or even two if they feel like they're going to be spending enough time in separate locations to need another. As long as we keep our walkability/public transportation good enough for most of our population that they don't feel like they need a car, I think we should be fine.
I personally feel like the car problems really start when you start building stuff in a way that people feel that they need a car in order to thrive. That's when you start getting things like every household in your cities wanting their own car and parking spot(s) to keep it in, or even two if they feel like they're going to be spending enough time in separate locations to need another. As long as we keep our walkability/public transportation good enough for most of our population that they don't feel like they need a car, I think we should be fine.