I think your approach rests on the assumption that rapes happen almost by accident. That they don't really know better. Everyone is inherently good or wants to be good, and some just stray from the path. If they were confronted with their victim's pain and you explained why it was wrong, they'll have an epiphany and refrain from doing it again. I think by and large they already know how wrong it is and they just don't care. Some perfunctory counseling isn't going to change their disposition, any more than "a better education system" is going to teach conspiracy theorists "critical thinking" skills that disabuse them of their beliefs. Something inside them is just fundamentally broken and it's probably beyond our abilities to fix right now.

Now, if you want to argue for some kind of early intervention system I think that'd be a great idea. Trying to predict and treat these kinds of behaviors in schoolkids before they crystallize could be worthwhile.