In my experience they were way worth taking when leaving a bar drunk. While other services charge more for those times, Waymo charged less because user volume. So where as Uber/Lyft would either struggle to find users who want to deal with the hours or have to pay more during those times... They didn't. Volume of cars stays up and rider volume decreases so instead of paying $27 for an Uber ride one night, I took a Waymo for $8. During peak hours it's more costly where I think Waymo may be the same or cost more.
But overall I'd say not having to deal with a human who doesn't want to deal with drunk people, paying less, and picking my own music to be safe were much better insensitive to help people not drive drunk. Think it cost me $15 to get the car in the morning. Then drove to an airport and never seen one since.
To compare I once had a Lyft driver drop me off in my town, and the driver was more drunk than I was, I actually just told him to come inside have a couple more drinks and sleep on the couch because he was swerving everywhere. Safer for me to pay the $6 on a couple drinks of my own and have him pass out on the couch than have him go back onto the road.