Coming from the O&G side of things where every flight ended with the use of the rotor brake, I've never heard of normal application of the rotor brake causing damage to any components. Not saying it can't but in the company I worked for, with thousands of hours and tens of thousands of rotor brake applications on the AW139, it never damaged the components.
Now if your scissor bushings were allowed to wear beyond limits.... Well that could possibly damage something.
I guess Leonardo will let you know.