Following the GPS has two benefits: assure the passenger they aren&#x27;t being ripped off with dubious&#x2F;scenic routes, and remove the mental load from the driver on each intersection. Any single trip could be faster by couple minutes of done by a local, or longer+pricier if done by a crafty taxi driver. The GPS narrows this variability, pacifies the passenger, and let&#x27;s the driver focus on the driving vs the routing. But yes, this sound general strategy can be frustrating in a local-maximum situation.