Friction keeps me in a job thankfully.
Bearings in both the Rudder and Elevators still wear regardless of actions taken by Airbus.
Selecting a bit of rudder trim takes up the null slack in the eye end bearing/ actuator connections to the main fittings of the rudder, if of course it is not another cause.
Control surfaces in non-fly-by wire aircraft have all hydraulic PCAs powered at the same time. We are therefore able to react one actuator slightly against another at null by a slight tweak when rigging the surface . This takes up the backlash preventing flutter and/ or vibration.
Airbus does not have this luxury with active and damping actuators, only one is in control at one time, hence tweaking the elevator actuators slightly down reacts against the air-load; in essence the other actuator as above, taking up the backlash.
With this in mind the bearings do tend to wear quicker on the Airbus, why is anybodies guess?