Have you actually looked at any of the studies the majority of our greenhouse gases are coming from? Transportation is only a small piece of it. If your goal is to stop climate change then there are significantly more important things you could be targeting. Fuels used for generating electricity, as byproducts in the manufacturing of goods, and the clear cutting of forests all contribute significantly more to Greenhouse production than Transportation does.
That's not to say we shouldn't reduce Transportation emissions still, which you seem to think I'm not advocating for but I clearly am because I am saying I want better public transportation and I want to be able to use my car less often I just don't want it taken away from me entirely. But using it as an argument for the removal of cars is weak because it's not even one of the largest contributors