I am in Europe and at country level public transport will never beat individual transport overall. In specific dense urban environments where cars can be extremely inconvenient (including because all the offices are packed in a few towers all at the same location), yes but again in the general case a bus will never be able to be as convenient as my own vehicle parked right outside my front door.

And yes this is a technical and practicability challenge on top of being prohibitively expensive to run.