See.
In this country, people don't GET the sentences they deserve. Someone who has totally ruined someone else's life in that way deserves life imprisonment. When the fuck does that ever happen here? Practically never. Someone can serve three years in prison for murder if they were 'of good character' (read: never got caught before), suspended sentence for rape, assault etc.
Obviously, letting people decide their own punishments for their abusers is never going to work. But giving crappy nothing sentences and expecting people to embrace the moral high ground or whatever is just bollocks. I guess if you have enough counselling it can make sense in your own head, but it doesn't alter the fact that a truly dangerous and disgusting person will be at large in the world some point fairly soon, and by reading of the fact he only got a couple of years in prison (or God forbid got off) other similarly disgusting people will take that as carte blanche to do whatever they like.
In the Telegraph article, she spoke mostly about wanting it to be a disincentive to other men who might be thinking about doing the same thing. I can understand that. I disagree with capital punishment and don't agree with this sentence but I can still understand that. Sometimes violence is the only language people like that understand.