The numbers do matter because the numbers are literally your entire argument. You’re arguing building for cars is more effective, you cannot make arguments about effectiveness without numbers. Alternative transport methods can be done with current tech since alternative transport methods literally existed before cars. There are plenty of examples of places that aren’t car-centric, and most major car-centric cities weren’t originally built around cars. I honestly have no idea how you could have thought that’s a remotely reasonable argument? It’s utter nonsense.

Even if your massive infrastructure overhaul argument was valid¹, we’re literally talking about a hypothetical scenario where you can pump absurd amounts of money into a project.

^{1. It’s not, just build other infrastructure instead of more roads. From a strictly capitalist perspective it pays for itself when more space can be used for taxable business instead of the dead weight of parking, and those businesses are more accessible to foot traffic making them more profitable and therefore generating more taxes. Not to mention the maintenance costs.}