People do not park in pedestrian zones. They usually get towed if they do. People usually take the fastest form of transport. When you have to search for parking, they usually mentally think of that and use other forms of transport instead. Even in car brained places like the US, it is not like Central Park in New York City is a giant parking lot even though there is clearly massive demand for parking in that area.

Not really. Different cities handked that question very differently. Some tore down large parts to make soace for cars (moving and parking), others were very cobservative about it. The latter did just as fine as the former in general, shiwing that it wasn't a necessity.

Little to no restrictions on who could buy, where one can drive, park a car were - and this is the last time I'm reiterating the same point because I know you just pretend not to get it - a choice. A deliberate choice made by thousands of cities around the globe, influenced by auto and oil industries. Cities were totally different before and have often been bulldozed specifically for that choice. And the other way around is perceivable too: once cities stopped deliberately choosing car-centric design, they were able to gradually stop being like that. See Paris post 2015, Amsterdam post 1980s. Both of which could not be had it been a necessity. Because it never was, it was deliberately decided to be this way.