I agree, as even the woman herself, once existing, cannot even then say that it would be worse for her to never have existed, as her wellbeing would then be undefined. These comments are very useful for helping me to refine my language. What I mean to say is that once she exists, she can then be happy or grateful that she exists, but can have no opinion if she didn't.

BTW, everything past "The error here is that Broome passes over to another metric without seeming to notice" is a statement of the view I'm arguing for, not a paraphrasing of Broome's argument. That's not nearly as clear as it could be however.