So I agree. Technically rotors are considered wear items and are not covered.
However, some have successfully made the case and gotten pads/rotors covered - in the event that the failure of those components was directly caused by the failure of an upstream/covered item.
For instance, a seized brake caliper piston can wipe out pads/rotors pretty quickly. A collapsed rubber brake line can trap brake fluid pressure and continue to squeeze a caliper which in turn overheats the brakes and kills the pads/rotors. Stuck slider pins can do this too.
However, Subaru can push back on some of these failures, blaming corrosion and rust, which is NOT covered. So it can get dicey and really require some root cause analysis to determine what's really going on that caused the premature wear.