Comment by fluidcruft

Sure, nobody has to tip anyone. But I do tip taxis and etc, typically about 30%, and it factors into my overall price perception.

I'm just saying $15 that I will add a tip to vs $20 that I have no intention or inclination to tip isn't anything more than I don't have any expectations or empathy about tipping a machine. It doesn't seem particularly complex an issue about why Waymo can charge the same amount that I am willing to pay anyway.