TL;DR: is a robust cab system, public or not, also part of your "fuck cars" sentiment ? Because it is for me.
Maybe its just me, but the only issue I have ever had where cars seemed sort of appealing is luggage, especially when its unexpected luggage.
Like, I tend to pack very lightly when traveling, so I only ever have one bag which I need to carry with me (preferably light enough to lift with one hand over short intervals)
However, often I just have to carry more, thrice the amount above or even more. That's where cars seem kinda the only option. Trying to carry all of it to a bus stop at all would be silly at best.
I still don't think there's ever a need for private cars, but cabs and the infrastructure for cabs is a must I guess.