This is just my own take on it (don't profess to be a car mechanic

) having got involved while the cause was being pinpointed - which took a few iterations: -
On mine both the top mount and the bearing that fits inside it were eventually replaced (both sides done, driver's side had been noisier). Initially they tried replacing the mount only and the bearing only.
These components work together as a complete assembly. Providing they are replaced together I'd see no reason at all why there should be any residual damage.
In addition to curing low speed noise over rough surfaces, this also cured a slight noise from the steering (when this bearing rotates).
Hope this might help a bit
