Does Waymo charge by the mile? Took LONGEST route possible.

Our car got a flat in the sidewall and was un-drivable so we downloaded the Waymo app and got a ride to work which is 6-7 minutes away at this time of morning.

The Waymo arrived in about 7 minutes and picked us up across the street. We got in and expected it to turn right at the main street to take the short 2.9 mile, 6-minute route (see dashed red line), but nope! It turned left instead which isn't actually terrible in and of itself because that's a good alternative route when there's heavy traffic (there wasn't, I checked Google Maps).

Even worse though, instead of going one block more to get on track again (see the solid red arrow), it decided to detour something like two miles further and go all the away around and come back through a neighborhood on the far side!

Is Waymo just dumb? Is this common? Did we pay 2x as much for a ride because it took a 5-mile route instead of a 3-mile route? We were late for work because of this and it doesn't inspire confidence to use Waymo again.