[grzm]

> Why not just simply ban cars from cities in general?

I think you're over-interpreting your parent. In some cities it is feasible to go without cars. There's a lot of space between cities and a lot of smaller cities and towns where that isn't feasible, at least not currently or without a lot of additional infrastructure.

[ekianjo]

Some cities yes, and you can honestly count them on not too many hands for the ones which have adequate public transportation.