I don't think you can take a whole genre of very popular books and say, "This is all trash!" When we read a memoir that isn't by a celebrity, we feel like we're about to go on a journey and we don't know where the journey will lead. But when we read a memoir by a celebrity we feel like we already know the journey and we just want to travel it.
I've taken on some of the emotional weight of the stories I've worked on. I was writing about a very difficult time in the life of one of my clients and I burst into tears at a small, crowded café. I'm not a crier at all in my own life. Maybe that's why I'm a ghostwriter.