Some background, my wife grew up in a very religious family, went to a tiny private high school and led a pretty sheltered life, as the two of us call it. We met our first year in college and have been together ever since. I wonder in the back of my mind if this has something to do with her never having been on her own because she basically went from living with her parents when she was in high school then to college where we met pretty early into our freshmen year. During one of our discussions I think she mentioned something about never having been alone and wanting to see what that is like. Again pretty selfish.
I know many, many women who grew up very similar to your W, and they did not decide they wanted to "go find themselves" or "see what it's like living on her own". These statements are common excuses the WW makes, when the truth is she has a hidden agenda.
It's all about her. She thinks it's her time to focus on herself and do whatever it takes to be happy. So, she tries to convince you that she's been unhappy in her M, and perhaps she's never loved you. It's what we call "script", b/c these WW's say so many things as if they all were reading from the same script.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
