You can have cities designed for cars that aren't hostile to other modes of transport. It's just nonexistent in practice in the US. See anti-bike lane movement

You can have cities designed for cars that aren't hostile to other modes of transport. It's just nonexistent in practice in the US. See anti-bike lane movements, lack of over and underpasses for pedestrians, sidewalks that quite literally connect nothing and go nowhere, local laws that prohibit walking on roads where there is no other access between locations, no crossings, signage, or road markings for pedestrians in commercial areas, etc. Go to a modern local shopping strip, park near the road, and walk the sidewalks. See if there's ramp or stair access between all parking lots and appropriate crossings between them. See if there are indicators before all curbs and paths for a blind person or someone in a wheel chair or with a stroller to travel. Being designed for cars only would imply useless designs wouldn't exist. They do, so we know that something is governing these things, just poorly and not in the favor of not-cars.