As you see, your advice fail by it self. And waiting to 22-25 is not a good advice either, because Lucy know what she wants.
In what I can agree is if the person have a dissorder of personality or something like that. But lucy go (or went) to a psycologist and all that, so the problem of a mental dissorder is already taken in consideration (even so the feeling as other sex is classified as a dissorder, but that is other discussion for another moment).
Also you clearly show a problem with the reflection of your own sexuality. So please, don't try to talk about your experiense, because is obviously biased.