I think it reasonable to judge a mechanism's efficacy and continued relevance. However judging members of a cultural regime seems misguided and (per the modern dating/relationship scene) somewhat hypocritical. (Yes people are getting raped in both regimes. No, our regime doesn't reward the rapist. Yes, both regimes are trying to affect social stability and what you see also says a lot about how that culture got there ..)
I think I disagree with this. Starting with the axiom "raping children is bad" (which, granted, is an axiom and not a universal truth like a law of physics), I believe it is not somewhat hypocritical to judge people who endorse this, even if I come from a dating/relationship scene in which casual consensual sex happens.
That said, I know that I do have a belief that one of the few true "sins" is the removal of personal agency from someone, and handing one's child over to her rapist is very much that; I wouldn't be surprised if I considered that action to be bad to a greater degree than others would. Still, at least I'm aware of my own prejudices in this.
[with p.s. to add regarding the "guiding" part: assuming our own moral condition is in fact in a healthy condition.]
Have to wonder what these parents think on the wedding night. Do dad and mom go home after the wedding, sit with a beer and try not to think about the fact that their daughter is being raped that very second? I suppose if they were the kind of people who'd have trouble with that, they wouldn't have handed their daughter over. I suspect they go home and feel relieved that their social group approves of them again. A happy occasion for them.