Right, which is why the actual solution is mixed use development and a robust public transit system.
Ultimately this is a geometry problem. Cars are by far the least space-efficient method of transporting people; eventually your roads just can't accommodate any more traffic. If there's enough demand to visit a given area then anything that doesn't minimize cars will just make things worse.
Cars are the most time efficient though, assuming you can find parking relatively quick.
> Cars are by far the least space-efficient method of transporting people
Not true in practice even if true in theory; in many places the average full-size bus contains fewer people than would fit in a minivan.
The problem is you need 5-10 years of reliable public transit in an area before non-transit users begin to convert (or transit users begin to move in).