Try it. I assure you, almost any angle you take can be poked through.

Cars shine in large, low density zones. For good reasons. Most anti-car people are not in favor of removing cars in these zones or removing cars altogether, so arguing here is moot.

Other places, whether removing a large amount of cars is beneficial or detrimental is decided either by culture, or by reinvestment options. And then, you're still stuck only comparing rationalities, with actual numbers being far harder to judge.