A few months ago my brakes developed a wobble, and the mechanic explained that there is a high spot in the rotor so when I'm braking the brake pads grab that spot more than the rest and it makes the brakes wobble or throb. The fix he suggested is to take the rotor off, use a lathe to make it flat again, and reinstall it.
So my question is, why don't the brake pads effectively do the same thing? I would think that through the use of the brakes, the pads would naturally wear off the higher spots more than the lower, and level the surface of the rotor again automatically. What am I missing here?