Depends of the place I guess. In some places bus drivers will absolutely never help you with anything but will mostly be useful for the company to make sure the

Depends of the place I guess. In some places bus drivers will absolutely never help you with anything but will mostly be useful for the company to make sure the fare is paid. You can even have foreigner driving buses that don't even speak the local language in some places. In yet other places drivers are explicitly not responsible for anything but driving to ensure their own safety, and are sometimes even physically separated from the public. Helping customers can also be made through intercoms at stations (some cities already have that). Also note that you have fully autonomous metro without any driver in many cities and a metro contains much more people that can have the problems you mention, so I don't see why it would be impossible to have a bus in the same way.