All necessary vehicles can be accommodated in pedestrianised areas when needed, as they already are in many places around the world.
Car infrastructure comes with many extra external costs, such as increased heathcare costs due to pollution, increased travel due to the extra space needed between everything, etc
Individual transport is great when it respects the world around it. A bike doesn’t need so many resources, nor does it take up so much space or cause harm to those around it.
Autonomous electric vehicles don’t go far enough with fixing the existing problems. Sharing helps but you still don’t need to take all that mass along with you on your commute, and there isn’t space to have everyone else in a city doing the same every morning.