While I agree that restorative justice is always better than punitive justice, nowhere in the post does OP mention that any justice was served at all, and statistically, it is almost certain that the rapist never saw a day of prison, and potentially isn't even on the sex offenders list.
They also never said they wanted them punished, but rather, that the safety of women be ensured, and in the same way known paedophiles shouldn't be put in positions where they have access to children, it isn't unreasonable to at least wish that a known rapist wouldn't be put in a position where they have access to potential victims. This is not punishment, it is consequences for actions.