Why is that? It's a fully public taxi service that will probably be heavily marketed in Fisherman's Wharf/Pier 39.
Presumably it will only be available for tourists once it's available to absolutely anyone.
"That means residents and visitors to San Francisco will be able to pay a fare to ride in a driverless taxi, ushering in new automated competition to cab and ridehail drivers." [1]
[1] https://www.cnn.com/2023/08/11/tech/robotaxi-vote-san-franci...
btw - are they going to check ID's??