It's very simple: make the car so that if the tank hits empty, the car doesn't run any more. If you think that's a problem, then please explain why this isn't

It's very simple: make the car so that if the tank hits empty, the car doesn't run any more. If you think that's a problem, then please explain why this isn't also a problem for the gas tank. I don't know of any cars which will continue to drive (but spewing extra toxins) when the gas or diesel tank is empty. Customers don't seem to have much of a problem topping up their diesel tank every week or two....