The risk that they cancel you/reject the ride if they think you aren't going far enough, going too far, going somewhere they are unlikely to get a fare, going i

The risk that they cancel you/reject the ride if they think you aren't going far enough, going too far, going somewhere they are unlikely to get a fare, going into a bad part of town, etc. Uber wants to provide service to where you want to go, not where it is most profitable for the driver to go.