Waymo uses remote drivers for their service. It is neat that technology has progressed to allow drivers to sit an office rather than the vehicle, but that's not exactly what people imagine when they hear driverless.
They use remote assistance for tricky emergency situations. That's a pretty big distinction. The remote assistance can be called in to help the car if it gets into a completely unknown state, but otherwise the cars are self driving.
Waymo has solved problem after problem you think they haven't solved yet, for some reason. They've intentionally gone after unpredictable situations and dealt with them.
And even if Waymo only works on well-mapped cities? That's still far from "can only work if they repurpose existing transportation infrastructure to only belong to self-driving cars" which is the comment I was replying to.