By using the term Autogynephilia you are giving it weight, substance and validation. Her reasoning is the same as mine: that there is a distinction between acknowledging the erotic overtones experienced by the gynephilic male to female crossdreamer or transgender person and what this word is meant to fully imply which is:
1) That the arousal is a distinct narcissistic sexual orientation
2) That it is the sole driver for the desire to transition and the source of the dysphoria instead of its symptom
Both of these assertions can be easily called into question primarily because they cannot be proven and that is enough to take them out of the realm of scientifically accepted fact. When something is unproven you don't boost its credibility by merely inventing a scientific sounding term. But then science isn't exactly the strong suit of sexologists.
We have made this type of error before with Phrenology and Nymphoman…