Honestly, once a traffic island city (like Singapore) or some other small nation state adopts self driving only within its limits and shows that it is much easier when all are self driving I think the opposition to the change will slowly reduce.

Rain, Snow etc. are still challenges but needs a bold bet in a place that wants to show how futuristic it is. The components are in place (Waymo cars), what is needed is high enough labor cost to justify the adoption.