I see the Empress ending for Ciri as her growing up and accepting her responsibilities. Sure, we all want to live carefree lives of adventures and video games ect ect. But then reality hits and you just do what have to do. You don't avoid it because you don't want to grow up. If Ciri can help millions of people by becoming the Empress then it's her moral obligation and responsibility to do it. At least that's my point of view on the issue.