> 1) Be the only ones to follow the letter of the law, break a lot of people's expectations, and catch backlash for disrupting traffic.

Plenty of drives dont use bike lanes. So, no, this is false issue. Waymo can simply act like literal majority of the drivers.

...I don't know why you think that a majority of drivers respect bike lanes. They don't. Nearly every driver has parked a car in a bike lane at some point. At least in the US it's uncontroversial - the bike lanes tend to be so poorly designed and thought out that it's much easier for cars to use them than cyclists.