Because an alarming amount of drivers are doing any number of things besides looking out of the windshield and probably missed 3/4 of them.

🎶Born in Arizona, moved to Babylonia, King Tut!🎶

But that engine is somewhat socialist. It evenly distributes fluids throughout, each component having the same amount of influence on whether or not the engine as a whole can function. One stops working and the others all stop in solidarity.