Cam regrind?

I've had cam's reground several times.. I do have the advantage in this case of be able to drive twenty minutes to the place... I have brought in a cam to far gone...
Almost no matter how many miles. I don't see how a rolder cam gets worn out. Unless a roller falls off the end of the lifter.... If I was out for a core cam cheap. I would head to the pick and pull with a lot of tools and time...