“Driving” is not solved unless you mean perfectly paved streets in perfect weather on empty streets with no pedestrians. A competent solution like Waymo can handle significantly more complex cases at real world levels of complexity, but it is still unclear how comprehensive and robust that really is across the massive complexity of reality even without other cars on the road. There is simply not enough data, and no independent audits yet.
It is prudent to remain cautiously optimistic that the evidence will bear out in time, but not assert unsupported claims.