I would say it matters for her. She needs to say this. For myself, I NEEDED to know I had done every single thing, given every single opportunity, to save my marriage. I needed that for my own self, and that is totally ok. While I could not do anything to save my marriage, I know for myself that I tried. Sometimes it's the action, even if you know it won't make a difference. She deserves to say it if she needs that for herself.