Maybe she's not like you. Maybe she was pissed at first, but now, 32 years later, she thinks, hey, move on.I am the same age as Polanskis victim. If someone assualted me like that 32 years ago, I would want his balls in a vice for life. Coward fled justice and lived a good life. Even if he bought the girl off, that doesnt buy him the right to flee justice.
Maybe she thinks she's a lot better off having had a substantial cash settlement, than spending her life tightening the vice on the guys' balls, as you say would want to do. If she's going to be raped, better it be by a wealthy film director than a homeless illiterate. That's assuming she wants to get over being a victim, and to put the experience behind her, and get on with creating a happy life for herself.
IMO, if she (willingly) agrees to make a settlement, that does buy him the right to move on. IMO, she has a moral duty not to renege on the terms of the settlement (not that we know what they were) -- from the standpoint of her morals, not his, of course.