We live on a finite planet. "More" can't last forever. That why people talk about degrowth. Growth is unsustainable on our planet. Either we degrow with control, or we collapse.

I suggest you play with the recently added timeline feature on Google Maps: notice how close we are as a species to a bacteria colony in a Petri dish. The forest areas of the world are especially impressive. You can see "mold" spreading on them at exponential speed.

We have finite resources on this planet. At a certain point we're gonna have a hard time finding the materials needed for things. Putting those resources into shared infrastructure like public transit means a more efficient use of those materials to benefit more people. A city bus can hold 42 people and uses far less resources and street space than 42 personal vehicles.

I think they mean in the sense you shouldn’t need to drive everywhere for everything. Or possibly there could be a system to share or rent electric cars so you don’t need to own one.

Maybe the solution is “more” pedestrian focused zoning and public transit