even full of oil your pump can fail or pick up become clogged. By the time the light lets you know it's too late. If you see a drop in pressure you know you need to find the problem before you damage the engine. If your idot light comes on (if you can even see the anemic light) you know by the loud knocking in the engine that you need to fix something.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!