Why we cannot have two drivers in one truck, who will drive in harmony? Truck is tiny, so it should be easy, right? As we know, we can have two or more drivers

Why we cannot have two drivers in one truck, who will drive in harmony? Truck is tiny, so it should be easy, right? As we know, we can have two or more drivers in truck, but only if 1) driving wheel is still single, 2) drivers are swapping each other at regular intervals, 3) they all share the goal, a final destination.