It's a signal that ride share apps won't be 100% autonomous anytime soon.
If you're a consumer and you want to go from point A to point B you don't want to have to think about whether your route will be in the AV coverage area, or if AVs are able to operate in current weather conditions, or if there are enough AVs available.
You just want to press a button and have some vehicle take you from point A to point B, whether that vehicle has a human behind the wheel or not.