If they prohibit autonomous vehicles, eventually their constituencies will be screaming for it.
It seems that many people, after trying out the service for themselves first hand, in a locale that has it available today, are very eager to have the service available to them in their home locale.
Maybe, although stupid laws can become heavily entrenched and surprisingly hard to change. Like in New Jersey I think you still can't pump your own gas, and some idiots actually defend that crazy policy for the sake of saving jobs.
But this is a great example: the reality is that pumping your own gas is simply not even a 10x better product than having it pumped for you.
If NJ consumers (and politicians) had a 10x better product dangled in front of them every day, then the regulation side would solve itself.
Waymo is truly just such a vastly superior product that consumers will get exposed enough to it to care, and when they care, they will solve the regulation side.