You realize that it's only free while they test and it's not going to be free forever, right? In fact, the protests are in response to a decision which allowed the companies to start charging for driver-less rides, so that is already changing.
Hard to say which way people will go overall. I personally am no longer a fan of driver-less cars. I used to be but now I see it as a doubling down of car-dependence. I could see a nasty rebound effect [1] through increased convenience and a lot of other negative consequences if cities adapt their infrastructure to cater to those vehicles. History repeating itself for "automobile progress." A possible second coming of demolishing our cities and neighborhoods to make way for cars. Yeah I know most if not all of the arguments for how the technology will just fix all the problems and make everything about cars better, I used to make those arguments myself. I don't believe them anymore.
- https://en.wikipedia.org/wiki/Rebound_effect_(conservation)