Parking brake should not wear out pads. TC could though. It tries to “grab” the spinning wheel so that the open will increase torque to the other wheel.
That said, it could be normal. EBD (electronic braking distribution?) has been around for a while. Used to engage the rear brakes first, to help prevent nose dive during braking. The fronts come in quickly as you ramp up pedal effort, but, for some drivers who only ever light brake, may find “excessive” rear pad wear, since rear pads are usually much smaller.
My ‘04 VW had EBD. I wore the rear pads out at 168k. Fronts were fine, and didn’t replaced until 175k, at that point, 3 of them still had 3/4 of the lining left (the fourth one delaminated, thus forcing the replacement).