I think he needs Mon to be the face of the Rebellion because it can't be him. They need to aspire to be something better than the Empire and he sees himself as being too much like them. The Rebellion and any future government needs someone like Mon because she didn't have to make the same decisions that he had to make.Mmm. Maybe, maybe not. He also knows how important Mon is to the cause, he wouldn't casually toss her away like so many others.