I don't think I follow that logic. If I was shown a photo of a baby (that eventually grows up to become a pilot) and asked if it was a photo of a pilot, I would say "no, it's a photo of a baby, babies can't be pilots". Sure, it's a photo of a baby that will become a pilot, but at that point, it's just a baby, even though they are the same person.
"Back when they identified as a woman" is the same thing as "back when they were a woman", because being a woman is merely an act of identifying as one, consciously or otherwise. There's no universal truth for "being a woman", gender is a human construct and therefore subjective, which means identifying as a woman is being a woman and vice-versa.
Frankly, I don't understand most of what you said, I must be lacking some context. But I do want to clarify one point, which will help me understand a lot of things better. You said:
How does one actually identify if they are a "man" or a "woman"? What list of criteria makes one of a certain gender?