I think the fact that the victims will now have a chance to feel safe outweighs the sadness of the fact that people might mourn him.
If I had been raped, and the perpetrator was in prison, I would live in terror of his getting out, because there have been more than enough cases of rapists being set free to continue to rape.
Now that there's the additional risk of rapists being put into women's prisons where they can continue to rape and terrorise incarcerated women, I think we should be putting out the fucking flags that one of them is dead, quite frankly.
I am sorry if you find this unedifying. I used to share your view but now I think the way victims of rape, compared to rapists, are treated is far more unedifying.