The Royal Family cannot in my view pretend that they have no role in the scandals. They have facilitated and tolerated those two for decades and are now trying to save face because it is becoming public.
I do not think for a moment that their antics were anything other than well known, and latest developments are shutting the gate after the horse has bolted.
As such they probably do have a responsibility to some extent for the ongoing welfare people they created and turned a blind eye to for decades. So she has a bit of a point.