It's not about crippling car infrastructure. There will always be good reasons to use large/flexible/powerful vehicles for a lot of journeys.

It is about not promoting car infrastructure to the detriment and ultimately exclusion of alternatives that have the potential to be widely beneficial to society (including, ironically, to those who still drive motor vehicles in our hypothetical alternative reality).

You can provide well for different modes of transportation at the same time. Several European cities have had great success in doing so and they are much nicer places for it.